Zune HD recently appeared on Amazon.com (link here). Check out the Product description and something interesting shows up: A built-in accelerometer senses when the Zune HD is moving, so you can play games and use apps that are controlled by moving the device.
This could suggest that the Zune HD might support apps like the iPod Touch. It wouldn’t surprise if it comes out of the box with apps or just eventually get apps. Another description, Integration with the Xbox LIVE network gives you access to millions of videos, TV shows, and games from Xbox LIVE, seems to also suggests that you might be able to play some Xbox games on Zune. This would be huge advantage for the Zune HD over the iPod with games.
We’ll just have to wait and see. No word on pricing yet but. The Zune HD comes out September 5th.
Looks like Amazon pulled the Zune HD page from its website