I am taking the "Wait and see" attitude with this one.

So far I have not seen anything that would cause me to want one yet. Yes it's faster then the 5.56 NATO, but so is the 22-250 (by quite a lot) so the fact that the "Valk" fits into an AR is the one thing that may make it grow in popularity. I do not know what the downrange addition of velocity it gives (not all that much as compared to a 22-250) is really going to gain over the NATO cartridge loaded with bullet up to 77 grains.
I do not argue that the heavier bullet at high velocity is going to beat the 556 at ALL ranges in a test of speed.

But I have not found the "mission statement" where that speed would matter in real world shooting. To sales-pitch this as a new "long range hunting rifle" seems to pale in comparison to dozens of older far more powerful and well established shells available for decades.

Around the middle of Wyoming the AR with a standard 5.56 chamber is the King of Varmint Guns and those that want something faster have been the driving force to barrel (or re-barrel) 22-250 bolt actions in 1-8 twist or sometimes 1-7.

Shooting at ranges over 600 and out to 1200 is not something anyone seems to need or want semi-auto function for, at least around here.

Personally I think an AR type rifle in a 22-250 would be very cool, but there are no magazines available that will accommodate that much body taper for such rifles (yet)

The 224 Valkyrie may be a step in that direction. It doesn't meet the velocities of the 22-250, but it is faster then the 5.56 NATO

But only time will tell if this catches on or fizzles. For me personally, I'll save my money and let someone else do all the research and development on this one. This may be very cool later on, but not interesting enough to me to make me spend money on one yet.