I've been playing with a Lenovo Yoga 13 at home for over 6 months now. Just installed 8.1 on it (no brick, though it did try to get me to sign up for a Microsoft account--somehow I managed to trick it into skipping that). Is it an improvement over 8.0? Yes, but that's like saying a sharp stick in the eye is an improvement on being drawn & quartered.
I
hate the new Windows 8 UI model(s). Switching back and forth is a monumental pain in the ass, requiring a workflow shift every time it happens. Accessing/using the window decorations in "legacy" applications is damned near impossible on a touchscreen. The on-screen keyboard blows goats. The Store is like a bad joke. System settings are scattered among several different apps in wildly illogical and inconsistent locations.
FWIW I don't use iOS. I use Android on my phones/tablets. My home desktop and (former) home laptop are Macs. We hit Netflix, Youtube, and our iTunes library on AppleTVs. So I'm used to switching around among different interfaces. I just shouldn't have to change gears on the same damned computer!