There will be more projectiles coming and already are, with the advent of the .277 sig fury (which destroys the 6.5 creed ballistics-wise) and the .27 Nosler (a whole different animal altogether). Nosler has their 165 grain ablr out and available now. Matrix ballistics (now shipping to the USA) has very competitively priced 155, 165, and 175 vlds. Woodleigh makes a 180 weldcore which is not a lr bullet but would absolutely SMASH out of the Nosler. Pretty sure cutting edge and hammer bullets make some "greater than 1:10 twist required" bullets too.
Now I agree with you. These aren't going be any good reason for 6.5 and 7mm shooters to get rid of their chosen chamberings. More like the development of a cult following, for people already enamoured with the .277 bore. People like me. It was my first deer rifle, my parents bought it for me when I was 14. I like the cartridge. I don't have a lot of reasons why but i just do and am not interested in the 6.5s or 7mms. Great to have more options, I've emailed savage and asked what the odds of them offering a plain vanilla 111 with a 1:8 twist or so.