Not hardly. While the P320 is a nice pistol, it isn't for everyone anymore than Glocks are for everyone. Nothing is going to leave Glock behind, and to think so is just being shortsighted. Granted Glock did not want to lose the bid, but the fact is the Glock is here to stay. What a lot of folks don't seem to understand is that Europeans are vastly different than Americans, and Glock is no different.
It took years for Mercedes-Benz to finally start putting decent cup holders in their cars. For years those who were not diehard Mercedes owners lamented over the fact that these cars did not come with adequate cup holders, but after years of pandering MB finally produced vehicles with over the top cup holders just like all the others. The thing is MB built the first luxury car, and they believed they know more about how to build fine cars than anyone. Their mindset is "we will build the car, you just drive the car".
Glock didn't need to make a single stack 9mm. Why? They simply didn't want to. It isn't what they started out making, and clearly isn't what they wanted to make for years. Who cares if you want a SS9! Go buy one...that wasn't what Glock made. If you wanted a no frills, reliable, light, higher capacity and cost effective tool that you can trust your life to then you'll buy a Glock. But they're junk, they said. They're plastic, they said. Glock will never last, they said. Now they're all building "Glocks".
Glock owns so much of the market that it would take a LONG time for anyone to catch up to them, and even with all the newer, more "innovative" designs now on the market, they're all still playing a very difficult game of catch up. "OH you're just a Glock fanboy"...no...I'm a realist. Glock owns the market in more ways than one, and what a lot of you don't seem to get is that while the Sig is a fantastic option for anyone, it's still just an option. Glock is the standard.
IF the P320 proves to be as reliable as the Glock, and I don't mean just shooting the gun...I mean how long can it shoot without cleaning, how much abuse can it really take, how easy are they to work on and keep running, etc., then Glock may have something to be concerned about, but not until then.