In addition to 1080p through Blu-Ray players, I believe the newer HD-DVD players utilize it as well. If you have an XBox 360 with an HD-DVD drive, you can get 1080p signals if your TV has a VGA input.
I have a 42 inch Westinghouse that does 1080p, and it looks great for games and high def movies. You can find them online for about $1400.
Not to be picky but you mean 1080i