This thread is 2 yrs old now - it's always best if you start a new one instead of tagging onto an old one, esp. with some of the 'necro thread-hungry' mods around
😛.
Anyway, I think Mr. Niebling (who is advised not to post his email address in a public forum where a bot crawler can extract it, unless he likes getting spam

), was asking more about an HDTV, not just a monitor. IIRC even the cheaper brands such as Vizio usually have 3-4 HDMI inputs on their larger - 37" and above - HDTVs. And I think that all HDTVs sold in the USA since the mandatory digital conversion last summer are required to have an ATSC (over-the-air) digital tuner and a clear-QAM (over cable) digital tuner. So if you buy a new TV, it will automatically have the necessary tuners onboard to either use digital cable or an antenna for over-the-air digital reception.
Personally I have a PC hooked up to use a 50" plasma HDTV as a second monitor, for displaying streaming video (as for example this past spring when watching the final Lost episodes from ABC TV in HD after missing the broadcast episode. It did require a bit of effort, as even after setting up the TV as a second display in Windows 7 (which automatically detected the proper resolution & refresh rate for 1080P: 1920 x 1080 @ 60Hz), the Windows desktop did not fit on the TV due to overscan. After I adjusted the HDMI input on the TV to not scale (i.e., dot-by-dot as Pioneer calls it), the desktop fit perfectly onto the TV.
Anyway, I now have an AV receiver connected to both the PC and a PS3 gaming console, via HDMI cables, and the TV connected to the receiver by HDMI cable. So whenever I want to play a console or PC game, stream video, connect to other media servers in the house for music or video, etc, I get 7.1 full surround sound plus a beautiful picture on the plasma TV. So watching Avatar on Blu-Ray on the PS3, or as a stored file on the PC, same stunning picture and room-filling sound.
I've used the USB connection on the TV before, but it's a bit klunky navigating an externa HD or memory drive using the TV's file browser, so instead I now have an external HD connected to a Netgear router with a USB port, so now the entire network can share the files & storage. Sorta a cheap media server without the media server interface, and since the TV also has a LAN connection, it can still access the external drive.