I believe it's HDCP you should be worried about, as you can always switch b/w HDMI and DVI with an adapter cable (well, cables, including separate audio). AFAIK, BluRay and HD-DVD will require HDCP (and so HDMI/DVI) for 1080p playback at some point in the future, but that restriction isn't currently enforced.
I'd be surprised if PS3 ever requires HDCP for 1080p gaming, though.