I don't see what it can do that can't be done better by other cartridges. A 7mm pistol is too small to be useful for personal defence, regardless of how fast you push the bullet. For jurisdictions where such a thing is possible, .22 LR and .22 WMR fill the small game/varmint niche with a wide variety of loads at a probable lower cost and better availability than this new cartridge.
Personally, I have no interest in centrefire handgun cartridges smaller than 9mm in auto pistols or .38 Special in revolvers.
Personally, I have no interest in centrefire handgun cartridges smaller than 9mm in auto pistols or .38 Special in revolvers.