There's something else to be considered: The QUALITY of the Apps available.
Its one thing for Google to talk about the "ever expanding Android Market." Its quite another when you actually go and see whats available there. The top paid "productivity" App on Android is a tool for rooting your device. There's also a File Manager and a Task Killer in the Top 10. There simply isn't anything comparable to Pages, Numbers, etc.
I'd bet that more than 80% of the Apps on Android Marketplace wouldn't be accepted in the Apple App Store. They either rip-off existing games; flagrantly infringe copyright and trademarks; or are of such limited utility/value as to scarcely warrant the name "App": There are almost one thousand different "coloring book" games for kids. Most of which make use of Disney, Marvel, Pixar, etc. characters. And we won't even get into the Apps that contain viruses or malware.
If Google was really serious about making a success of their Tablet App marketplace, they'd concentrate on getting developers to make a couple hundred really great Apps. And hire a couple of people to just say "No" to the junk.