I caught up with Darryl Burling of Microsoft for a coffee the other day and had the opportunity to check out his Tablet Kiosk eo v7110 running Windows Vista. Getting Vista on the eo was a little tricky - here's how he did it.

I've played with this exact device before and I was surprised how much faster it was with Vista on it. And that was without even using a USB key as a ReadyBoost device to boost performance.
The touch mouse interface - which I blogged about here - really makes the experience with the touchscreen device much better than the XP experience. This is what the was missing for me in the first generation Origami devices.
Darryl also pointed out that the Vista version of the tablet input panel is much more usable on a small screen device than the XP version was.
But the killer feature? Media Center. That interface just rocks (no pun intended) on a touchscreen device.