Home theater isn't the first place you'll think of when it comes to gift ideas, but that's too bad.
Streaming-media boxes like the Roku LT and Apple TV are inexpensive and fun, plus they'll give you plenty to watch over the holidays. I've personally had lots of success giving universal remotes like the Logitech Harmony 650 as a gift. Not many people want to spend $60 on a remote, but once they have one, they can't imagine going back.
These are my top overall home theater picks, ranging from speaker system to game consoles, but if I had to pick just one it would be the Roku LT. It's a solid choice for almost anyone with at least a Netflix account and it's cheap enough to buy one for a friend.