It's really cause no one wrote any Windows apps, and a lot of the ones that were written have been removed because the respective companies don't want to maintain them. The Kindle reader for my Windows Mobile phone was sooooo buggy.

If it had the apps to back it, Windows would have been okay as a touch OS. But that whole thing totally failed.

Microsoft should have put the Courrier table into production. It was ready to go. That one move totally killed any chance at Microsoft making it into the tablet realm (and really set them back 2 ~ 3 years as a consumer tech company)