You means DVD Recorders. There are DVD players that have HDMI connectors and the players upsample to HDTV 720p/1080i specs. I guess the same idea would be possible with a DVD recorder when playing back content from a built-in hdd or a disc on the player. I’ve never looked for one. As far as true HD recording that’s coming.
HDMI will show it’s true use when it’s used to protect Blu Ray / HDDVD to HDTV content. The next generation DVD players will use HDMI with HDCP (HD copy-protection) but the HD video will only play on newer HDTV’s with HDMI. If you own an older set with a DVI connector you will not be able to play full spec HD from an HDMI equiped player device even with the HDMI>DVI conversion connector. Those how bought early versions of HDTV may be very disappointed. If it plays at all it will be at lower resolutions only.
That’s why I waited to make sure before buying a set. Some stores still had old style DVI equiped HDTV on sale even as little as a few months ago. I haven’t looked lately though.