The iPhone has a guaranteed wider set of possible
interactions.
The iPhone is much more than a desktop or laptop computer. A basic
computer includes a keyboard, mouse/touchpad, monitor, and a processor.
You really should throw in a printer, but it's technically not a
requirement.
Compare this to an iPhone, which has a virtual keyboard, touch
screen/monitor, processor, USB connect/hot sync, WiFi, Bluetooth,
headphones, camera, motion sensors, some type of GPS positioning, and a
cellular phone. There is also a selection of apps you start with no
matter what else you do - web browser, email, clock, etc.
No iPhone comes with less, and except for storage size or 3G
support, not much is built into the newest iPhone that's not found in
an older model. Sure, all the missing items can be added to a desktop
or laptop, but it is not a guarantee that every computer - or even a
large number - will have all the same features.
Every app for the iPhone can mix or match the built-in features for
a huge combination of applications. You can have a game that uses the
motion sensors for control, add in GPS positioning to assign a location
to where you are playing, and connect via cellular or WiFi for network
competition/interaction. For a computer game, it would be hard to find
a large customer base that had all of these features installed on the
desktop to allow such a new game design to succeed.
These combinations allow you to create novel apps to separate your
product from thousands available elsewhere or to compete with an
entrenched big budget program. Would a Mario-like game be more fun with
a GPS feature, or if you could add your own photos, or if it allowed
you to use songs from your own iTunes collection? The possibilities are
huge.
The iPhone is there when you need it.
Of course, both the iPhone and a laptop computer are portable. You
see laptop computers at the airport or Starbucks. Even though a number
of people like to lug a laptop computer everywhere, a much greater
number of people have their cell phones with them. There are countless
CrackBerry addicts checking their email, or young couples on dates not
talking but text messaging each other.
Why aren't these people using laptops? It's because a phone is much
smaller and easier to carry.
When we went on a family vacation, there was an iPhone app for
Disneyland. You could use it to check wait times at different rides.
This kind of app works great while at the park, but it would be useless
at home or in the hotel. Our laptop stayed in the hotel room during the
day, and it would not have been fun to carry on Space Mountain. The
iPhone is more likely to be there when you need it.
An iPhone app is easy to distribute and sell.
The app market for the iPhone is completely unlike applications for
computers in general. It is not because they have to be, but Apple has
lowered the bar for making, selling, and especially distributing
apps.
Sure, everyone has heard of Microsoft, and you can buy its product
at any large box store. But what about all the little guys like Lemke
Software, Freeverse, Pixelmator Team, etc.? There are thousands of
computer apps, but where is the best place to shop for them and to find
the one you want? New companies are making a name for themselves on the
App Store without having a $300 million marketing budget like
Microsoft.
iPhone apps are 'fun' and tailor-made, while web pages are slow and
you have to search too much.
There is an iPhone weather app, or you could go to weather.com and get the same information
from a web page. Why have a separate app when the Safari browser can
find thousands - or even millions - of useful web pages? Dedicated
apps, with their icons, help you quickly find what you are looking for.
Browsing the Web requires extra steps and can take longer.
Since the iPhone includes both the browser and focused apps, you get
the best of both worlds. It is like the fact that I have both a Swiss
Army knife and a kitchen knife. Sure, the Swiss army knife can do it
all, but I'd much rather cut up vegetables with a kitchen knife. A
tailor-made tool is more enjoyable to use than one that is merely
adequate.
The iPhone is a great gift for a spouse.
Suppose you don't like something about the iPhone, maybe the battery
life is too short. Give the iPhone as a gift to your spouse, who will
think it's a great present. Then ask them to look up directions for
you, or check a web page for prices, or download a game for the kids to
play. This way you get most of the benefits of having an iPhone without
having to own one yourself. I call this the win-win scenario, as long
as the monthly phone bill isn't your main issue with the iPhone.
The iPhone bridges gender and age differences.
Note that I said spouse; the iPhone is great for the husband or
wife, son or daughter. The appeal cuts across gender lines and across
age differences. Programs are popping up to appeal to the broad range
of users. It is not just for geeks, hard core gamers, or business
users. The iPhone has a little bit for everyone to enjoy, and this is
being fed by an increasingly larger number of apps to choose from.
Is it any wonder that sales of the iPhone have continued to grow
even in this down economy - or that the App Store is the latest Apple
idea that everyone has to copy? When you consider that Apple wasn't
going to have an App Store, it is truly amazing how important the app
has become for the iPhone system. It has made the whole much greater
than the sum of the parts. 
