I was wondering this very thing after picking up "Elizabeth: The Golden Age" at Best Buy over the weekend (30% off)...noticed it had web enabled features and thought, 'for how long?'
With these HD wars causing the companies involved to hemmorage money, I really don't see them keeping these ancillary features supported for more than a year, tops. We'll see, I guess. Depends on whether there's a way to implement on Blu-ray and still support HD-DVD w/ minimal addt'l cost.