Except that the game has changed in 150 years - both the rules and the manner of play have evolved over time. Dead ball era, live ball era, lowering the pitching mound in the 60s, the advent of the DH in the American League, moving to divisions with divisional playoffs in the 60s, interleague play, the development of 5-man rotations, the recent emphasis on advanced metrics - all examples of a game evolving. I would see this as just another evolution. It will change the essence no more than any of these other did.