When all the bitcoin blocks would be mined which is expected to get complete in 2021 , then new blocks will be added in the blockchain. Current block size reward is 12.5 BTC and at the time of completion of them would lead to reward size to be half which is 6.25 BTC.
So blockchain split would be game changer in terms of processing the blocks , currently it takes 2 minute of time to search an hash later with the Segwit2X support , it would be taking 1 minute of time to process the blocks.
Enjoy the Mining!!!
Well described