I had this conversation with my mother-in-law this weekend just after she finished showing me the Home Media Features of her TiVo:
"Would you believe that none of the music I bought from iTunes would work with it? None of it, because of that DRM."
"You should buy your MP3s from Amazon."
"Oh, I know about that, and I will, I'm never buying another thing from iTunes."
Nobody cares about DRM until they have to, and then they care passionately.
It may take a while for your customers to figure out that you've shafted them with DRM, but in the end they will, and they're all going to be as mad as my mother-in-law.