Nintendo Switch console drop?

Dropping the Switch will not affect it's resolution. 
If your controller connects now, there's no reason why it wouldn't in the future.
If it turns on, you can play a game without problems, and you also don't hear anything rattling around inside, you'll probably be fine.
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The Switch actually handles drops pretty well:
https://www.youtube.com/watch?v=y8QCFNAgPDo

Is possible to not working properly to appear less resolution or connection between keypad to be more delayed? 

if it's working it's working, if it ain't it ain't, simples, but i wouldn't advise letting that happen again if it is...well i would, but the truth is i hate nintendo and all their arcade junk software, count yourself lucky if it all seems ok, that's quite a drop, for a delicate piece of tech....magic eye?, how's that