The guys are hacking on you because of your verbiage in your OP, but I'm picking up what your putting down.
As much as I love my Berettas, they don't make a lot of sense if I have to limit them to ten round mags. I have plenty of 18 and 20 round 92 mags, so if those were to be grandfathered in any proposed legislation that would ease things, but there's no guarantee of that happening this time. An uber expensive production gun like the aforementioned Staccato makes even less, especially since it's really just a high cap 1911 and I already have plenty of those in single stack form.
The real question is, would Glock see the market share in a single stack .45? Unfortunately, I think the answer to that is no. Nine millimeter is by far the most popular centerfire pistol round today and gaining more traction every day. Glock already has successful single stack nines. I don't see them tooling up for one in .45acp.