>>273516612
Hopefully VR will be popular enough that the next generation will at least come in T-shirt sizes, S/M/L for different IPD ranges instead of trying to one size fits all. I wonder if anybody will start selling custom molded faceplates for the index, I'd pay for that. 

>>273516841
Nothing announced, and considering all the headsets released in 2019 (quest, rift S, cosmos (lol), index) I wouldn't expect anything until 2021 earliest. Most industry guesses at the true next gen aren't until 2022.