I've had the preview installed on a hybrid / convertible since it was available. So I guess that counts as both a traditional computer and not.
Win 8 is definitely polarizing. I love it - but only for that computer. If it didn't work so well with the touchscreen, i'd be in the "meh" camp for sure. I'll be replacing that install with the Win 8 upgrade later today. But I'd never even consider upgrading my desktop or primary laptop. That would feel like moving into a new house just to get a different front door. Too much trouble for too little return and likely a host of kinks to work out.
But on the convertible? It shines.