Originally Posted by Utopianemo
Projector Central did a direct comparison, you might check that out(they reviewed the 4010, which is the retail version). I asked the author a similar question and he had this to say:
"I was actually saying that the 5040's black level advantage, in general, is lost either in ambient light (ie, anything other than a dark home theater) or with content that is of typical or bright average picture level (meaning, typical mixed brightness content that is not overall very dark). Otherwise, the 5040's black level advantage is clear in dark room viewing whether HDR or SDR.
The 5040UB's successor is widely believed to be pending, but until we look at it we can't judge how much improvement it might yield vs the 5040UB."
Thanks for directing me back to the Projector Central review. I had forgotten all about it.
The most telling part of the comparison is summarized by this statement,
"introduce really dark, challenging scenes, and the 5040 absolutely outclasses the 4010, with or without its dynamic iris turned on. On these dark scenes, which cause the viewer's own iris's to open wider and therefore delineate finer differences between gray and black, the 5040's advantage was not only noticeable but staggering at times."
In other words, at similar cost, buy the older UB model, hands down.
Not sure why we are even still talking about the 4050. Epson's marketing team sure did a great job generating excitement for this "home entertainment projector" during initial launch. In absence of a 5050UB what else were they to do.