This some kind of joke, right?
New technology certainly gets a lot of derision. 200 fps is slow. "Bounce off your Carhartt jacket" slow. Paintball is commercially restricted to 280 for liability altho there are those who tinker. Fastest hardball pitch is claimed to be 105.1 mph, math math math 154.1 feet per second.
So this think barely goes more than oh, say, 25% faster than a pro baseball pitcher. Jai alai players can sling the ball at 84 meters per second math math 275 feet per second. Note all these folks don't stick to one speed measurement. It's about marketing the sport.
On the perspective of where on the development curve it might sit, we are talking dial hardwire phone in an age of cell level automatic pistols. Pretty much the same as 3D printing gun parts - closest thing I got is a P365 jig for filing the safety notch. In ten years of "OMG 3D is gonna be so cool!! " and I get a widget? Yes,someone printed a $5000 1911 but they only did the one. LIkely Knight bought it for his collection.
So, portable .50 cal sabot slug launcher? Ouchie.
It's whatever the next power multiplier steps up the speed that will likely count, same as watching computers and LED's double in power and drop half in cost about every 2-3 years. I have a small collection of early LED keychain lights - 20 LUMENS!!!! and currently carry a usb rechargeable with 250.
In ten to fifteen years will these electromagnetic devices be able to get to say, 9mm speeds? 1,200 fps? Not impossible, how will the ATF then assume how to regulate them, and what will they consider to be the serial numbered "frame" which constitutes being a firearm?
That will be the more interesting discussion.
We already passed that threshold with lasers and people get convicted for aiming them at pilots, who have been injured and lost their eyesight and career. Big picture, lasers on the battlefield are a gamechanger for causing incapacitating injuries with immediated tactical results. It's hard to fight blind and being a sitting duck. I would be much more concerned about the significant lack of discussion in military armaments journals. Kinda like, OK, the navy shelved the rail gun because "it didn't work?" The Air Force shelved the flying wing, the YB-49 in the early 50's, yet we have fought wars in the Middle East with them.
They became B2 stealth bombers.
History shows when the projects go dark there are significant improvements to be concealed.