I suspect I'd need to upgrade at least to a latest, flagship laser-based PJ a few years from now (w/ all the needed room treatments for HDR10 or more) to see all that much of a diff vs UHD discs though -- and I'm guessing the discs probably go on sale more often, more significantly than the...
Niiice... although I don't see much point in comparing the PQ (between that, personal rip w/ Shield output and Vudu) the way he did in the video -- there aren't nearly enough rez to determine unless a particular stream is really bad and not even remotely close to 1080p quality, let alone 4K...