The Zune HD is up against some stiff competition. On the left, you have Apple's iPod Touch with its larger 3.5-inch display and iPhone app compatibility. On the right, there's Sony's X-Series Walkman, which includes integrated noise cancellation, Slacker radio support, and a gorgeous OLED display that rivals the Zune's own OLED technology.
The Zune HD can certainly hold its own against these two, especially with features such as HD radio and HD video output. Still, it wouldn't hurt if Microsoft priced the player aggressively. At the time of this writing, Zune HD pricing and capacity have yet to be announced.