I kinda want to and I kinda don't. Both machines are great and yes next year promises so much more but I am concerned about resale values.
If the M1 setup would do everything you expect to need to do, then it's probably worthwhile to pull the trigger now vs later. Your current Intel systems won't ever be worth as much as they are worth today.
However if there's something missing - a need for a larger display, a need for Windows, a need for more RAM or more ports, then you'd be wise to wait until there's system that meet those needs. It's more expensive to resell/buy again because you didn't buy what you needed.