Now Panasonic has adopted Dolby Vision support it means 3 of the main 4 brands support it along with TCL, Hisense, Vizio (US), Philips (US only), B&O and Loewe. The main hold-outs are now Samsung and TP-Vision (Philips in Europe). Studio-wise only 20th Century Fox is HDR10+ exclusive and they are being bought by Disney who have supported Dolby Vision (and still do on their digital titles). Disc-based HDR10+ has technically arrived but limited to some niche documentaries and a few announced (but yet to be released) films (Bohemian Rhapsody and Robin Hood etc). Streaming-wise, only Amazon Prime have announced support for HDR10+ (and I'm not sure how much of their catalogue is encoded) but are also supporting Dolby Vision. My main question - if Samsung and TP-Vision (Philips) go it alone with Fox and non-exclusive Amazon Prime how long can the standard last?