Windows. Yes I am a linux fan and hate everything windows, having used windows 7 and having to reformat from scratch one month after purchase because of 'issues' internal to the OS and I am having issues getting USB 2.0 to work with windows 7, or sound etc.
Anyway I digress. Windows is crap at touch screen and resource management for a small lightweight device.
This isn't going to appeal to people that don't want to wait for AV's to run and want access to an app store which I thought was the main selling point to all these tablets?
If you still have to stick in a CD to load up and, rebooting because windows 7 can't install without a reboot etc.
I like the design but it is dell and Windows together.