I've got the same disc. I just calibrated my new Panasonic with it and the only portion of the disc that seemed outdated was the "contrast" section which used CRT blooming to find an accurate white level.
I read online and found that if you go to the Reference Materials section and find Title 13, Chapter 2 that there's a test pattern of boxes that works well (there will be a black box with grey inside and a white box with grey inside - use brightness and contrast to get these grey inner boxes just visible). Other than that, things like color accuracy and sharpness haven't changed.
That's my two cents.