When you say 'Micro' I think of Kahr PM sized guns. I see the general class of Hellcat/P365 pistols as subcompacts.
I do expect the class of pistols being discussed here will eventually divert sales away from the G19 and its close competitors.
I usually think of micro as Ruger LCP or kel tec type size
"Pocket Guns" to my age group LOL. Creating new terminology is a marketing strategy to get people interested in buying something a little different than they already have. In this case they seem to have actually offered a package that a seasoned shooter can use about as well as the midsize pistols.
In my mind, this and the LC9 class of pistols is where the 9mm really makes sense.