Lots of posts here and the next forum about this ....
In a nutshell .... The HR10-250 HD DVR receives DirecTV's MPEG2 channels (SD and HD), along with over-the-air digital TV channels. DirecTV's new satellite-delivered local HDTV channels are rolling out now in various cities using new satellites (99- and 103-deg) and new MPEG4 compression. The HR10-250 cannot receive those. Over the next year (or more?) it's likely that new HDTV channels will use the new satellites and MPEG4 compression, and some or all of the current MPEG2 HD channels may migrate to MPEG4. But DirecTV hasn't announced anything specific about those plans yet. When the day finally comes, though, your HR10-250 will still be able to receive over-the-air HDTV channels, along with other MPEG2 DirecTV satellite channels. And, of course, DirecTV is still promising attractive upgrade/swap program for the new HR20 MPEG4 HD DVR (which are not Tivo-based).
Sony SAT-T60 120GB (v3.5b)
HR20-700, HR20-100, HR21-200 HD DVR
HR10-250 HD DVR 400GB (v6.4a)
H21-200 HD Receiver
R10 DVR 160GB (v6.4a)