Well, my personal situation is maybe a bit different than most people here. I use my 2016 MBP 13" for social science research, and this dual core i5 is even struggling to scroll through my lengthy Word drafts while I have Zotero and Safari in the background.
I have a desktop PC for gaming, so I'm in no particular rush to upgrade vis-à-vis GPU performance - although I'm looking forward to that new use-case of portable gaming on a 13/14". I'm more interested in the battery life, general responsiveness of the system and mini-LED screen. I'm expecting to become quite mobile again post-pandemic, and will require a good machine. Plus, goodbye bad keyboard!
I'll probably upgrade whenever they release the 14", whether it's in August or October. But I'd feel let down to get an A14-based core design in late 2021.