hi, i am sorry but i really need help! :-) i convinced my other half that we should buy new tv. and of course i am lost. Just wanted to ask - what is this 4k ultra hd for? do i really need it? is it better to buy tv with it or should I not bother? (will i use it?) budget is 500£. 43" - 50" (but it may be too big thou). should have wifi and be ok with kodi. Looking at Samsung UE49K5600 UE49K5100 or SONY BRAVIA KDL48WD653BU (but there is lack of apps as per reviews?). No LG (yep i did read comments for every single tv on here!) Thanks for help. Been awake as I ate too much last nite, not because of sales!