I think a lot of it really comes down to what your definition of a "truly homogeneous beam" is. By (my) definition, any of the 12x 4 in 1 type lights won't meet that because they don't use a common optical path. The generic COB units would probably count (again, by my definition), so long as the beam and field angles are relatively close and the lens doesn't cause any noticeable "pixelation" of the COB light engine. In comparison, ETC's Source Four LEDs use an array of LEDs followed by a series of mirrors and lens to produce the even and consistent output that the conventional S4s are known for. Does anybody know the real "industry" definition of a homogenized beam? I've only associated this term with lasers until it became the next best thing with LEDs!
I'm sure the Chinese clones will follow in due time since Chauvet, Elation, and others are now producing these lights in addition to the much higher dollar products such as what ETC sells. The question though is whether or not to buy Chinese when the optics of such a unit are so important to its critical function. That's a decision that only you can make. I'm of the buy once cry once mentality, especially when the unit in question is critical to my product, but at the same time LED stage lights are still progressing so quickly that it's hard not to question a 5-figure investment on a few dozen of these lights only to know they'll be obsolete next year... Fun discussion though!