M-Go probably has the next highest amount of 4K streaming movies next to Ultraflix. It is my understanding that they only stream their 4k content on Samsung for whatever strange reason. Then you have Amazon and Netflix with less 4k movie content; however, I do not believe that Netflix can stream in HDR and Amazon really restricted on content. This could have changed since I checked this DD but it appeared to me that Ultraflix was well ahead of the pack. It will be interesting to see what the strategy is for NTEK to provide services to competitors. Nevertheless, still very little 4K streaming content out there. Perhaps NTEK will become the major supplier of 4k content and let these other companies pay the bulk of the costs/fees. Interesting indeed...