While I agree with those who say 7.1 and 5.1 test material would be great, I really think one of the biggest things is making sure that the end user who may be a complete novice, is able to fully utilize your product. To often with these test discs there is a near complete lack of information for the end user on EVERY test that is included. Sure, it is great for someone who has had professional training, but why not include some data files - Like Adobe PDF files and/or some video files on the disc that owners can refer to so that they may fully utilize everything that this disc has to offer, or at least get some info on what they need to learn so that they may some day fully utilize the info.
Meters, test gear, etc. that they may find helpful someday, and stuff that they should leave to profiessionals. The whole nine yards of information, if it were included, would really seem to me, to spark sales references when people are asking what they should purchase to set their system up.