Mostly No, because what we tend to gain in resolution we lose in compression. A 4K UltraBlueRay, sure, a 4K PS4 Pro/Xbox One X mostly you see much better backgrounds but foregrounds start looking chunky like they were a previous non-HD generation. 2D games, photos and artwork look fantastic however, even without HDR.
To get a really usable 4K experience from streaming, everyone needs to have at least 100Mbit fiber, and until that happens, most 4K screens will be sold as a half-step upgrade towards 8K UHD while compression catches up. Like a 4K experience from conventional cable is impossible because many cable systems still broadcast MPEG-2 (h262) streams to be backwards compatible with old hardware they won't upgrade. Likewise ATSC, we were in such a hurry to sell off the TV spectrum to mobile networks, that 4K, let alone 8K will never be available to more than a few cities (ATSC 3.0 only started this year at 4K and there is no broadcasting content in the US, only Korea) and those capable of receiving it will get a highly compressed signal that only makes it "better than 1080i", but little else.
Hence the future is streaming apps and "channels", we're still being shorted by geofencing however of streams and that will have to end if content providers want piracy to drasticly be cut. Current piracy boxes based on Android (typically nVidia Shield since they're more powerful) are 95% SD content, and the rare HD and 4K content often takes as long to discover as it does to watch, so legit streaming services (eg netflix) still have an upper hand, but the compression of legit services is often worse than Blueray, so until that changes, the appeal of streaming 4K content will be rather low.
