I think it'll fly.
Its actually a great concept, a true one gun fits all kind of thing. Are there any others out there that match that capability? I'm not aware of any.
The biggest negative of any gun is the way that it feels in the hand. It looks like they pretty much have that covered. Small,medium and large hands.
They've got the caliber wars covered. Hate the 9? Go with the .40 or .45. Cant handle the .45? Go with the 9mm.
Too big to carry concealed or not big enough for a full duty gun? It appears that they even have that one figured out.
For some Police Dept's. it might be the cats meow. One gun that fits all scenarios, the Road Officer, the Detective, the support units that never leave the office. Carry the full duty gun all day and swap it over to the smaller concealed version for off duty.
The Sig guy completely tore down the gun in less than two minutes and put it back together again with no tools. Anyone that cant figure that out doesn't need to be a dept. armorer.
I currently have 6 Sigs. in all the calibers. This looks like it might be Number 7.