hypoteticaly speaking ... what if it does happen ?
I'll mine more coins and that is about it.
And... it would be nice to see a few drops in difficulty, because it would mean that all those ponzi 'cloud mining' operations will have to pay more to their victims.
a few serious drops in difficulty and we will soon see which of those are legitimately mining and which are only in it to run with the bulk of profit and disappear into oblivion.
The only exception to this would be when we get much closer to when the block subsidy halves again