Yup Android app store is still underdeveloped, but it's growing now, especially the games. Developers are starting to port their games from iOS to Android. But yes Apple app store games trash Android games any time. Except maybe the Gameloft gamesI quite disagree that iPad is useless.
What I like about iPad is:
Larger screen for game (better than iPhone)
Reading books
Using it to do your presentation
I don't see a point of saying it is oversize iPhone as it is mentioned by Steves Job already.
iMac - iPad - iPhone
The iPad serve as a product in between. Android game market is still quite small right? Cannot be compared with Apple Store lah, it's very enormous now.