Although it has been stated images at 1080P look better upscaled on a 4K TV...

What is the enhancement and how would you describe that it is an improvement?

Is it simply a smoother image?

Something I have also been reading about is refresh rates and how this can be an important factor also in deciding what screen to go for...Well for computers it is, but also as for handling I have heard some TV's running 4K content revert to 30HZ which is poor...Watch out for those ones only except 60HZ running 4K.

I am guessing 4K content with either HFR / HDR or 3D will be interesting to see if there is enough bandwidth for all 3 although HDR may be processed at the screen end more than likely and have nothing to do with cable bandwidth.

@Negative 1 Christie (Sanyo) make some really nice projectors I use Panasonic most of the time but use Christies on occasion also. These and Barco's are Generally the best brand projectors on the Market.