This.
Although I have to admit that I haven't tried it on a tablet or touchscreen. But when I ran it for a while it was the worst OS I have used in the 20-30 years I have been using computers.
Right after WinMe ... I cannot believe it took them so long to realize that people won't adopt W8 until they bloody stop forcing Metro on everyone. And ever tried to use Windows 2012 remotely ? Using the damn "hotspots" to open up Windows / Sidebar is just more than annoying, especially when you try to fix a damn server at 3am in the morning </rant>
But heh - 8.1 here we come :-/