Look at the place we are in desktop web development because we have to support old browser. We are stuck 7+ years in the past.
I understand the intellectual allure of writing a framework that supports a gazillion different devices and I appreciate what you've done with jQuery for web development but frankly, I don't care about jQueryMobile.
Except that it scares the hell out of me the day some client starts asking me to support 5 year old Nokias.