Sure thing you can create a system that is unbreakable, but it will also be one that noone will want to use if it restricts renting of games/movies/whatever.
Fly with me can be pretty entertaining as well, but 2600, Democracy Now, and Cinecast are all excellent as well. Gonna try out The World: Technology. Good recomendations.
As for the UI its great that it's now vector based but I doubt that the everyday use of a computer has been simplified or truly improved. As far as I have heard there is no really great addition that tells me why I need to use Longhorn instead of skinning my XP.