Now here is a question to keep things heated up. Suppose two projectors are of equal lumens out and one is of a resolution just under 2K and the other one is of a resolution of 4K, would they work equally well on the same screen? Or would one require a better screen than the other (not re gain, but re smoothness and ability to sharply resolve on off 4K vs 2K pixel patterns). And might this not be a reason to move from Studeotec 130 to a Snomatt 100 or even JKP Affinity .9 or 1.1, a screen of exceptional smoothness and of the ability to resolve a tight on off pixel pattern. And all other things equal, would one projector require a better lens to be able to resolve 4K given that the other projector which would only require a lens with the ability to resolve 2K.
Another issue is the lens quality of various projectors. A one chip DLP projector can indeed be sharper than any 3 chip projector regardless of DLP, reflective LCD, or transmissive LCD. But it certainly depends on the lens quality.
I own several one chip DLP machines and one with the same T1 lens used in certain one chip DLP machines mentioned here as possible alternatives to the Sony. The T2 lens available with these machines is a better lens than the T1 which certainly is no slouch. But great lenses the T1 and T2 are not. Their choice is dictated by price point and pretty much all competitors at these price points use those lenses.
My Samsung SP-A900B in my opinion based on my comparative observations is a better lens.
How good is the Sony lens? I really don't know but I will tell you it displaying misconverged 3 chip 4K SXRD (and ALL 3 chip projectors will not have perfect convergence, thus they will all have some degree of misconvergence), doesn't make me miss the sharpness of the Samsung let alone the lesser sharpness of a single DLP LED lit machine using a T1 lens.
A one chip DLP machine can clearly have better sharpness than any three chip machine but that depends on implementation including lens selection and except for a potentially sharper picture to me it can't hold a candle to a three chip DLP. And I can't define it except to say a three chip DLP has a more solid firmer image much in the same way a 4K three chipper is more solid in image than a 2K three chipper. What I am waiting to see is a 3 chip 4K DLP machine with a 4K quality lens and a street price of the Sony. In two years we will see it at a MSRP of $89,000. Just a prediction.
If money were no object, I think a great three chip 2K DLP machine is a viable to the Sony 4K machines. It clearly will do certain things better and others not as well. One needs to chose and be prepared to pay a lot more for the choice of a great 2K three chip DLP. Its hard to go wrong with either. And for that matter it hard for most to afford any any of them.