Many years ago my department sent me to the Glock armorer's school. While there I had the opportunity to speak with a Glock rep and asked him about the possibility of a commander-sized big-bore (.45 ACP/10mm) to which he responded, "Why would we do that?"
When the rage of the single-stack subcompact gripped the market, I began a letter writing campaign to Glock begging for a gun in that configuration from them. All letters went unanswered.
My opinion is that due to the massive success Glock had with the introduction of the first mainstream polymer pistol, they sat back and rested on that success until companies began to become more and more innovative. Look how long it took for Glock to adopt the interchangeable backstraps that nearly every other company already had.
As much as I would love to see Glock produce a single-stack subcompact in 9mm and .40 S&W (as Kahr, Taurus and Smith and Wesson already have), I fear this is going to be another warmed-over modification to an existing gun in the same vein as they did recently with the G30S. I truly hope that I'm wrong and, as I told Glock in my letters, if they produce a single-stack subcompact in a major caliber, I'll be among the first in line to purchase one.