I think Android's going to become a stronger platform for apps and it's always going to appeal to the more hard-core nerd hackers so many Icontrians are. The Pre will have cute social applications, solid PIM stuff and super casual games.

The iPhone has a little of everything with a focus on good UI's and experiences and a decent selection of games across the board but with really good stratagy games and racers. However, you'll also waid through mountains of utter crap to find the good stuff. But it's not as hard if you follow the right people on Twitter and have a few good RSS feeds like Touch Arcade. It also has the numbers in it's favor right now.

The Android platform will take off much more as soon as there are more devices, it's going to be great accross the board but will draw in more techy apps, more hacks like the NES/SNES/Sega emulators (which Apple could never allow do to the copyright issues, at least not without a jailbreak). I think it will also get deeper games but with less big titles until the Google phones start selling at the kind of numbers Apple has.

All my own opinion and speculation though, just my two cents.

Insider tip though, the real action is all going on on the Palm OS, that's the place to be for the really hot underground stuff.