Camera Specifications on Smartphones having 200MP. Will we even know the difference?

Most of the screens we own are mostly maxed out at 4K, maybe 8K for a TV. A quick search says 4K uses ~8.3MP per frame.

Or can any camera enthusiasts let me know what would they actually consider when buying a camera/smartphone? I've seen friends purposefully buy certain cameras for certain 'filter' effects - how can we know? or is it - just a feeling thing?