Agree with your Win 8 eval, well, mostly.
Intel had sent me a Sony Vaio E14A and an XPS 12. Both touch enabled.
On the Sony, i only used metro to pass time (basically to try it out), otherwise i sat n the desktop...and to be honest, the additional $250 for a touchscreen didn't seem worth it. I did feel like poking at metro, so that's a win, probably, but the entire UI was so
cut up...
You constantly had to juggle between both and...every time i'd want to click the start button, i'd freeze, remind myself what was going to happen, and then either avoid clicking or...well, click.
Charms are weird with the mouse. I finally figured why it's called the charms bar: you have to wave your cursor like a wand!
But yeah...it's just too cut up. Same for the XPS 12 in tablet mode. Had to keep going to the desktop for some odd thing, and touch is difficult there. There was also one time when the software keyboard didn't show up, i couldn't understand how to force it, so i had to resort to useing the old on-screen keyboard.
Did you notice how you can't reposition the text cursor by tap-and-holding? You have to use those arrow keys on the keyboard! WP8 is better, thankfully, though that lacks a file system and a decent music app (and a task manager, and a...)...
By biggest complaint with Dell ultrabooks is that they insist on blowing hot air into your lap. Total hybrid-ultrabook killer.