"The Original. Remastered." is the tagline on ads for the new TOS, so I'm assuming TOR is the appropriate three-letter designator.
In any case, TrekMovie.com has some images of the remastered Balance of Terror. The images are at standard definition quality, so it's not the HD glory we're hearing of.
While it's unfair to judge based on these screenshots, I have to say that perhaps the attempt to replicate the 1960's over-lighting of the Enterprise was not the best plan. The ship looked pretty good rendered in the ST:ENT lighting style, but while I haven't seen her in motion yet, in these images the ship looks flat and kinda cartoony, with only the vaguest hints of the details seen in the beauty shots posted online. Of course perhaps the show looks better in HD, but perhaps TOR is not the best thing for standard-def.
One thing that seems clear, though, is that the forward nacelle caps are crappy, with none of the multicolored christmas-light look. I don't get it either . . . the ship looks absolutely frickin' gorgeous in the beauty shots, lit properly and with nacelle caps that are multicolored and very wait-is-that-the-real-model?-esque. But in the images we're seeing the nacelles look like they were done in Windows 3.11 Paintbrush with the Pepto-Puke color selected.
Hopefully the situation will improve, and Balance of Terror (serving here as the "pilot" for TOR) will either look really great on HD or else will be redone to do so. Or, most hopefully, maybe the screenshots are just crappy and things look great in full motion.
Fingers . . . crossed.