Gradually that's changing as more networks shoot in high definition and more cable operators strike deals with broadcasters in major markets--but it takes time. Comcast and TNT announced on Monday that Comcast will provide a high definition version of TNT to its HD subscribers. Launch dates for TNT in HD will vary as the cable company makes agreements with different broadcasters in different areas.
The timing is good for basketball fans becuase TNT carries the NBA playoffs--sports are one of the major draws for HD as manufacturers target gadget-hungry men with big-screen televisions.
TNT shows in HD are broadcasting in 1080i--referring to 1,080 lines of interlaced resolution--24 hours a day.