So very odd and random question, but I'm confused iPad Pro 12.9" is about a 3K display and looks amazing when watching any video. I'm getting training for work in Home Theater systems and UHD TVs. I already have some moderate knowledge to HDTVs, but my question has always been, why do I still see the pixels on UHD and why do we need 4K blu-rays? The reason I ask this silly question is that I can watch a 1080p or higher video on an iPP or iMac 5K and the quality is still crystal clear, but when viewing blu-rays or anything on 4K TVs there pixelation and blurring and just less quality... and again I can see the pixels. (Which is just weird to me.) Why don't companies make their displays like what laptops and HD desktops do? Like with a Dell, Surface, iPad, or MacBook do, where the pixels are so close together and small you can't really discern them. But watching Netflix or iTunes on 4K image quality is not as good. Again, I can watch my 1080p movies on my 3K iPP or an iMac 5k and again the picture quality is still crystal clear (and even better that some 4K TVs, and without extra accessories. ) What am I missing aside from the size difference? I almost feel like instead of buying a 4K or eventual 8K tv I'll just by a 27" iMac and use that to stream movies and such while also using it as a computer.... 27" obviously isn't huge, but it's not far off from my TV I have now. Again this is a random question, sorry.