Stevet, yes NTSC is going away ( at least 99% of it is) this Feb. While UHF has it's limitations, it does a decent job. A few of the digital stations are once again taking up residence on the VHF band, mostly upper range where they can get the most punch. It will be curious to see what these stations call themselves, since most will not be on the freq. they have been on for decades. No more ABC 7 news when they are ABC 23? Though with virtual numbers they can remain on virtual channel 7, but on cable many times they are not on their "real" channel number and people get used to that.
On digital sets you can sill adjust color and brightness, just as on any set. Once you set it you basically forget it, there is very little variation in the signal, not enough for me to bother with. For anyone who buys a new set I always recommend, or show up with my copy of AVIA to properly set the unit up. This is the most rudimentary method, but it does a pretty good job. For mid or high end sets I recommend having it professionally calibrated. Almost all sets come out of the box in what is termed "torch" mode, everything set high for punch on the display floor, this is far from correct color. Even older NTSC sets can benefit from a good adjustment. It may look strange to you for a few days, but after you get used to it you will see more detail and a more accurate picture.