The Android Marketplace sucks. Plain and simple. Finding apps is a pain in the ass, unless you know exactly what you are looking for. There are tons of apps out there, but most of them just don't seem to deliver the promises that they make. Many apps ask for tons of unnecessary permissions to use your device. Without the rigorous screening that's taken place in the iTunes store, it opens the door for some pretty scary security holes. As far as quality of apps go, the marketplace seems really lacking. The good are few and far between. Quality tablet-specific apps seem almost nonexistent.
I think it's a mere fluke that the Android platform got so popular. It started off as a nice base for hackers to play with their devices, while still having the backing of a major entity. Now the hacker community is just a small fraction of the user base, somewhat hidden away to avoid the beggars and skiddies who want their phone rooted and flashed just to get some new live wallpaper or something. I don't think it's as nice as it probably once started out with developers donating their free time to contribute to a mobile platform that actually made sense, as far as freedom was concerned.
The freedom is still there, but now mainly only to those with the patience to read the fine print. It was implemented poorly allowing applications to abuse the user's (pseudo) privacy. The Android world is a little daunting; It requires a bit more thinking that could be expected from today's automated society.