We have all been waiting on tenterhooks for a look at what the Jupiter tablet UI for Windows 8 will look like. We have out best idea today with a leak via WithinWindows showing Internet Explorer in its so-called Immersive finger-friendly mode.
As expected, it looks very much like the Windows Phone 7 Internet Explorer, featuring as little chrome as possible.
Also of note is that when the address bar shows the UI looks like the screen shots of IE9 for Windows Phone 7, but with a newer history tab based on small screen shots.
It seems the short of it is, if you like Windows Phone 7, you will love Windows 8 also.