Sure, but it's a huge step backward in features/usability. Like gaming, there are people saying that crap like Angry Birds and Fruit Ninja are "the future of gaming." If that's the future of gaming then my game days are done. I haven't seen a single game app on either the android marketplace or apple app store that I thought was worth enough of a damn to actually pay any money for. And my new phone came with a "Quickoffice" app, one of the most popular "office suite apps" on android market, that's little more than a exaggerated Notepad. The music player on this Samsung Captivate is the only music player on either platform that I've actually liked, that doesn't look like it was thrown together by some shit java programmer in a few days. And so far as I know only Samsung Galaxy owners get it with the those phones, unless it's specifically an AT&T thing.
I agree, it's a step backwards. But it both plays to and takes advantage of people's lazy nature - you put your credit card or paypal information into an app store once, then you download shit. Bored? Download a game. Need to calculate something? Download an app for it. It's easy to see why Apple, Google, Microsoft, etc. want to do it though - more money, more control over the device. And it's easy to come up with reasons that other industry groups would get on board - the more locked down your devices are, the harder it is for the average Joe to go out and obtain pirated content.
I don't understand the mentality of the user. I remember getting my first phone and wondering why it had both a calculator and a tip calculator. The latter is a less functional version of the former.
It's not unique to electronics, though. If you go through a home goods store, you can find several models of peeler, several models of corers, etc. You could probably have a kitchen packed with a hundred different single-purpose vegetable and fruit preparation devices alone. Or you could just do what my grandmother did and use a paring knife for all of the various functions.