We're talking affordable projectors that can accept 4K content. None of these are true 4K projectors, but all provide a sharper, more detailed image than you would get with a standard 1080p projector and source. On this page, we have an overview of each projector to give you a good idea of their strengths and weaknesses. By our count at this time, there are 5 projectors shipping that can handle 4K content with prices under $3500. This includes three Epson models (two are virtually the same), two Optoma projectors and a Vivitek (the one that isn't quite shipping yet). The Epsons are 1080p pixel shifters, by comparison, the others are 4K UHD pixel shifters.
Of the six, all claim and implement HDR best they can (technically they would all need to be a lot brighter to do HDR properly, so the "results may vary." All but the Vivitek attempt to tackle BT.2020 color space, or at least the P3 subset. As to the Vivitek, since it's not yet shipping, the recent request by them to hold off on the review, perhaps indicates that they may have decided that since their closest competitors, the Optoma's do tackle the wider color space, they might have felt it necessary to add that capability. Well, we should learn how that turns out over the next month or two, whenever they Vivitek starts shipping. Also as it turns out, at CEDIA I finally found out the difference between the HK2288 and HK2299 Viviteks. At first I thought the HK2288 was white, the HK2299 black cased, but like the Optoma's one will be under $2000 (the HK2288) and the HK2299, a $2495 price.