Instead of getting a PC that can function as an all-around personal computer and family entertainment device, you get an expensive family entertainment device, period. Both those functions require a sharp screen and a lot of resolution. Sharpness is easy to understand. Anything displayed on the screen should be clear. All outlines should be cleanly etched and not fuzzy.
Resolution is harder to understand.
It's the way we describe how much detail we can see in something. That's all I could see. The resolution of my telescope wouldn't show me any more. Now, of course, the Mars rover can show us rocks and pebbles on the surface. The difference isn't sharpness.