I am just looking forward to wimbledon, not really a tennis fan, but if/when it happens then things will be on the mend...

like behzad said - its a tricky subject... if You have a really expensive computer monitor, say at 4K native resolution, and you drop the resolution down to HD [1080p] then it will still look pretty good; but a cheap monotor will not

it sounds like you have a good TV

[as you may have noticed my implied point is - is the TV upscaling your video, or is it downscaling its resolution to match....]