Don't worry, they won't stop making revolvers for you. 
No one has introduced a new revolver design in the last 30 years that I'd even remotely consider spending money on.
It seems like most of what's coming out these days follows the "slap another half dozen rails on it, throw in an optical sight, find some more surfaces to checker, and call it the hyper turbo super duper tactical practical ultimate Sasquatch model! That will wet some panties! And a brace! Don't forget a brace! Know what? Throw two on it for good measure! We'll call it the PBB (pistol brace brace)"
Ok...
Regarding the Quattro... OK, so someone reinvented the Suomi Casket magazine.
Just found this on a review on Guns.com...
"While I am not sold on replacing my duty rifle with the Quattro, the American concept of “bigger and better” makes the Quattro-15 a great firearm to add to your collection."
Well *expletive deleted*it... sounds like the Quattro is a pussy commie gun. We deserve an Octto! Because 'MURICA!
Sigh.
Anyway... yeah, interesting concept, but unless it comes with an adapter that will allow me to run regular AR magazines in it, no thanks. Not interested in taking the risk that the concept fails, the magazines go out of production, and me being stuck with a gun I can no longer use.
EDIT IN:
OK, looks like the Quattro magazines are less than $50 a pop. Not as bad as I thought they would be. I was figuring north of $100.
Remains to be seen how well they function, however. Similar magazine designs in the past have been... problematic.
