Personally I really don't like the idea of any kind of Touch Screen computers, I mean, It just wouldn't feel right (For me at least). I think this may be an optional Interface, As opposed to us been "Forced" to use a more touch screen friendly layout.
It does look "New" to an extent, But if I'm honest, It just looks like they've taken the Start screen from the new Windows phone and made it bigger.
On the topic of "I like the idea were getting something new": Well, Let me say "Don't fix what isn't broken". Windows users know the UI well, And they obviously like it, Or they would use an alternative. Whats more, With the large variety of software available now you can change your UI to look like anything you want with little difficulty.