If you're anxious to step into the high-definition future, HP's Pavilion m7690n Media Center TV PC makes it relatively easy. HP's first HD desktop adds HD-DVD movie-watching to the long list of its home theater PC capabilities. For $1,649, this fixed-configuration, retail-only PC is more expensive than stand-alone HD-DVD or Blu-ray players, and its midtower desktop form factor is not exactly living room friendly. But it can also do a lot more than a plain old disc player, and there are few desktops or laptops below $2,500 that will play HD discs of either format. Between now and the 2007 Consumer Electronics Show in early January, we expect to hear about lots of new desktops with one HD drive or another.