Chris112 - it's hard to say what the inHD channels "theme" is.... just 100% HD. They also get pre-empted for the big award shows like the grammies / oscars, etc... for the pre-awards red carpet coverage done by E! but in HD.
They have their own channels (inHD, inHD 2) listings on their website: www.inhd.comHere's just a quick general summary:
a) HD versions of many of the iMax theater movies ("Dolphins", etc...).
b) "In Theaters" a 30 min back to back current movie trailers (mostly the long versions) in HD and Digital surround.
c) Concerts in HD and digital surround.
d) They have They also repeat shows alot.
Forgot to add: They also get pre-empted lately for even College Hockey in HD (regional, Boston College, etc...) They even show, scheduled, high school basketball in HD.