Its identical for me, same counts for movies, games, music, etc... The only exception being that I'm not buying movies in HD. I'm happy with DVD for mat and my old skool 4:3 TV. I'm watching HD on my PC though - mostly through Hulu.
I can't see spending near CD prices to get MP3 quality music. Sound-wise they seem similar enough, but I'd prefer to have the uncompressed version that you can get from a disc. I also have issue with DRM and the RIAA lawsuits. Both have had a significantly negative impact on my willingness to spend on music.