Is a "real" multitouch tablet even possible?

Disappointed by the closed nature of the App Store being thrust upon such a beautiful device, I started wondering if it's even possible to take a full desktop OS (as they are seen today) and use it for a multitouch only experience.

The more I think about it, the more I think the answer is: No.

Companies have tried many times over the past few years to craft something that people will use everyday with just their fingers, without a keyboard and mouse. And those companies have all failed.

Maybe a locked down, limited device is the only way to have a quality multitouch experience in a small portable form factor.

I sure hope I am wrong.