This reflects my experience with my clients. I develop for iOS, Android, and WinPhone7. I've lately gotten quite a robust bit of WinPhone7 contract work coming through my doors. And it's not because there seems to be some huge explosion of demand for it, but rather that nobody else locally seems to be developing for it. So due to the scarcity of local developers, I'm getting a larger proportion of Phone7 work, and I'm having to raise my rates.