The idea that 3D HDTVs are inferior to regular HDTVs is ignorant poppycock. "3D really messes up the contrast & colors of the tv because you have to wear those dumb sun glasses."
You do NOT have to wear the glasses to watch 2D content on a 3D TV, nor do the glasses mess up either the contrast or the colors in 3D. They do not work like the polarized glasses you use in the movie theater (which do affect the contrast and color) but are far more sophisticated, blinking between opaque and clear in synchronization with the frames shown on the TV screen. Indeed, because the "blinking" (so fast that it is not noticeable at all) tends to dim the ambient light in the room that gets through to your eyes, making the picture appear even more vivid in comparison.
There will certainly continue to be improvements to 2D TVs, particularly as regards framing rates for LCD sets. It is now quite common to see 240 fps framing rates, and the first 480 fps sets are already (plasma is at 600 fps but the picture is not capable of the same level of brightness as you can get on an LCD set). This improves the smoothness of the motion.
The first OLED sets are now hitting the market, albeit in small screens and at extreme expense for the time being. The screen sizes will increase and the prices will drop rapidly, however, and these may be the "final say" in digital television receivers. Instead of filtering a backlight like LCD screens they actually emit the light directly, permitting a virtually infinite contrast ratio with brightness levels even beyond those LCD TVs are capable of (and WAY beyond plasmas), on a screen that is flexible and hardly any thicker than a piece of paper that may allow them to be rolled up like a projector screen. I want one of THOSE!
Now, Toshiba has just demonstrated a 3D TV that does not require glasses. Early reviews indicate that the 3D effect is surprisingly effective but the system is quite complex.
I watched a plasma 3DTV in a Best Buy for about an hour. It was quite amazing, with the 3D effect far beyond -- LIGHT YEARS beyond -- anything I have seen in a 3D movie theater, even Avatar. But I still have my doubts that 3D is "here to stay," so to speak, particularly if those dorky (and very expensive) glasses are needed. But 3D HDTVs are actually SUPERIOR to most other HTDVs on 2D content because their framing rate is necessarily the highest.