OK. I am trying to compare the feature set of DTV and U-Verse and I understand that there is a limit as to how many HD streams you can pull off of the wire when using U-Verse.
So based on this thread, there does not seemed to be a limitation to how many HD streams I can access. As long as the individual hardware limitation is not exceeded (two per device), we should be good.
There is no limitation. Currently, a DVR can only record 2 shows at once, but you can have 4 DVR's which can then record 8 shows at once. With whole home DVR, you then watch all 8 shows from any other DVR or tuner in the house.
As far as comparing it to U-Verse, there is no limit in the amount of receivers you can have and/or channels coming in at the same time. If you have twenty TV's in that huge mansion of yours, you can watch HD on each and every one of them, at the same time.
You can do that with Cable as well by the way. Only IPTV is limited, where FIOS still allows at least 8 HD at the same time, and U-Verse is limited to anywhere from 2 to 4 HD, depending on how close you are to a VRAD. Most customers see 2 or 3 HD, and 2 or 1 additional SD, for a total of 4 channels at the same time.
If the U-Verse DVR is recording 4 shows at the same time, NO ONE can watch TV.
(except for already recorded programs)