I would describe "futureproofing" as how long do you expect it could serve you well enough.
take my gpu as example, its a gtx970 bought 4.5yr ago.
I expect to use it for 8yrs (ideally 10yrs), at 1080p while lowering the graphics setting if needed, I dont really care about fps as long as its smooth gameplay etc.
I would say gtx970 is futureproofing to me
futureproofing varies from the need and expectation for each individual