I'm using Unity right now on my Samsung NC10. Not touch, but it's the same interface.
Hopefully we can configure the icon bar on the left to hide by default the same way you can hide the task bar on any desktop.
Right now you can't. It's a little annoying because it means I have to left-right scroll on some websites (1024x600 screen).
Speaking of the task bar, how is task switching accomplished on this thing?
Apps that are opened appear in the left hand dock (if they aren't there already because you've locked them as a launcher). If there are a lot of apps open some are "collapsed" at the base of the dock. You can scroll the dock up or down by click (touch) dragging up/down.
Open apps get a little triangle to the left of their icon in the dock. The foreground app gets a triangle on the right of it's icon. If you have more than one window of a particular app open, clicking it's icon gets you an exposé style animation that shows you all windows of that particular app. Using the workspace switcher icon in the dock shows you all workspaces and each app open on each workspace. The video seemed to show a way of viewing all the apps open on one workspace - I don't know how to do that - I just Alt-Tab to them.
My biggest concern, what happens when you want(yes, want) to use the terminal?
I added the terminal to the Unity dock launcher. I assume there's some sort of on screen keyboard available for touch devices.