I sell satellite but would love to offer satellite tv on PC but it is a long ways out. Cable companies want to sell you tv service as well, so they limit your bandwidth. Hence, no hi quality video service.

TV stations and content providers don’t want the same problems the the music industry is having with pirated content - they have more control with broadcast tv.

Now you can get some media, but never as much or with the same ease of satellite or cable tv providers.
References :
http://www.SatHookup.com
http://www.ScrubMoney.com/save-money/free-tv/