I find this whole discussion real interesting, especially the video. What I am basically after in HD audio (in addition to future recordings taking advantage of the HD format as the lecturer discussed) is someone taking the original master tapes used for vinyl and creating a 24-96 (or better) HD version that captures the recording with full dynamic range or something close, so that I have a digital recording that sounds as good as my vinyl without the pops and clicks. Now mind you, I listen to my vinyl as well, but like to mostly play my music off a server run by Foobar (and I have good equipment across the board from DAC to Klipsch Heritage speakers).
Many of the HDTracks catalogs have been developed from master tapes (or as early generation as possible if the masters don't exist) and many have not. And, given that I have a 4TB server, I like to collect different versions and compare the sound (to my ears) and DR. The HDTracks Doors catalog for instance is quite good, but does not really sound better than the Steve Hoffman masters CDs, and the DR range is about the same. Tom Petty also used his master tapes to develop the HDTracks versions and they sound great. There are several other examples.
So, it really does, in my opinion, take some investigating to figure out if it's worth spending the coin on HDTracks, Pono or other versions of recordings. If they really did use master tapes and create something true to the original recording without compression and a lot of tinkering in the remaster, then it is worth the money and they've earned it.