It didn't take any great amount of foresight to make this prediction:
My Amazing Kreskin Prediction? Look for a Glock 2.0, with modular grip and ambi slide stop/mag release within five years.That was February of '06, and the "Gen 4" Glocks were released four years later, with interchangeable backstraps and reversible mag catches. I missed on the slide stop.
They're still going to lose some business over the pull-the-trigger-to-field-strip issue, though, as liability-shy departments will go to guns where you don't need to do that (that's a big feature in the sales spiels of guys from S&W and SIG, you'd better cool believe.)