Biggest question for AMD would be how integrated is the decryption stage to the rest of the hardware assist engine on the video playback portions of the chips?
If you've mashed them together, this would be an example of a multi-billion dollar industry, that honestly doesn't provide the main source of your revenue for that product lineup, telling a multi-trillion dollar industry what to do.
Video playback may not be the largest "driver of sales" but providing protected video paths is a requirement for Vista, and Vista is a requirement for OEM sales, and OEM sales are a requirement for ongoing success in the market. The challenge is how best to meet the non-negotiable requirements of the Windows market while not inconveniencing the Linux market. I think we have a plan that can do both, but it sure isn't as easy as it was back in the R200 days.