You heard it hear first. He is talking about superchargers, 2170's, a 120kW model S and X battery, and of course, UI 9.0Elon just tweeted some interesting news. Next gen superchargers might be coming quite soon. Also he indicates some other improvements which might be the updates S/X that has been rumored for some time? New charge port with CCS, bigger batteries? new rear for the Model S?
"Exactly! Will probably unveil next gen Supercharger late summer. Major improvements all round."
Elon Musk on Twitter