As Steve Ballmer clearly indicates, developers are whatâ€™s important. Developers are also the main reason Windows as a desktop OS is so popular.
Wired.com have asked lots of developers what they think of WP7, and itâ€™s well worth a read.
The major complaint of existing WM seems to be the variety of handsets (making it difficult for developers to cover all devices). Whatâ€™s interesting, is that to me thatâ€™s not a huge issue. Yes, you have to make your software resolution aware, but thatâ€™s no different to a desktop OS.
The only thing we can really do with regards to WP7 is wait for MIX10, and not have developers bickering about a lack of anything until itâ€™s confirmed!