HP's TouchSmart 610 is the must fully-featured Windows all-in-one, complete with a touch screen and well-developed touch software to go along with it. Touch all-in-ones aren't for everyone, but if you're in the market for one, HP's is one of the most robust.
The first true gaming-oriented all-in-one, Lenovo's IdeaCentre B520 is a speedy, fairly priced, do-it-all home entertainment PC. It even supports Nvidia's 3D Vision technology, and includes a set of the required glasses. It's not quite as fast as a standalone gaming desktop at the same price, but this system provides a capable, self-contained gaming experience.
We love the '80s future retro looks of the Samsung Series 7 all-in-one. While it's not quite as loaded as the more expensive HP TouchSmart 610, the Samsung's smartly chosen set of features and elegant touch software make this perhaps the most user-friendly all-in-one for consuming digital media at home.