if you want to attract a lot of developers then1 think just must be very easy and that is the development tools.. Yes also on windows, it must be more like download, install, next,next, finnish and you are up and running with a development environment that can do emulated and or on device debugging

this is how it works for android, its just an eclipse plugin that can be installed as far as i know on all oss's with on device debugging.

so its tooling,tooling,tooling if you ask me. i hope that QT Creator will go in that direction asap..