I think the .27 Nosler is 'the next big thing' for the .270 caliber. It will be 'twisted' to handle 165grain and 170grain high BC bullets. It'll produce lots of speed and power. For those looking to push the .270 into the 'modern' world, that'll be the cartridge to go to next.
I think the .270 WSM already 'captures' the short action, higher powered option adequately, even if it isn't ideal for the long, high BC bullets. I'd like to see a .270-08 Ackley Improved catch on, but what's it going to really offer that the .270 WSM doesn't already? I just like the idea of a .277 bullet out of a .308 case...just because.
Frankly, the .270 Win is pretty great just the way it is. Nope, it isn't going to shoot the heavy BC bullets and knock elk down at 1000 yards. But that's okay. It's pretty awesome out to about 600 yards, which is as far as I'm going to ever attempt to shoot a living, breathing thing (personally imposed limit.) Nosler makes a 160 grain Partition that works in the 1-10 twist, if I ever get the urge to chase moose or bears, I suppose. The 130 grain is great on deer and antelope. The 150 grain is good for elk, mulies, and black bears. The 90 & 100 grain projectiles are very good on varmints. Modern rifles and scopes allow us to really use the cartridge to its best inside 600 yards. Hard to believe a cartridge from 1925 is still holding up so well in 2020 against the newest fads. It'll be interesting to see what comes next.