I can only speak for my 2 stores. But #1 is DnD; #2 is Call of Cthulhu; #3 is Pathfinder #4 is Star Wars WEG Reprint; #5 is Savage Worlds. I haven't sold a copy of Starfinder since last October.
Genesys is essentially their Star Wars funky dice resolution mechanic with the Star Wars license peeled off and open to whatever you want to do with it.
I've played 5E. I know nothing about the test.
Genesys is really hot right now. It's a univeral system based on the Fantasy Flight narrative dice first used in Warhammer Fantasy Roleplay, then used in the various Star Wars games. They also have a setting out based on the world all the Fantasy Flight games are set in (Descent, Runebound, etc).
FFGs attempt at WFRP is why I won't touch FFG RPGs. Shame they got Lo5R.
Would love to see a setting based on their LCG cyberpunk setting.
My local FLGS used to be Pathfinder, and then D&D5E slowly became more and more popular. Currently it seems to be solidly D&D5E with Starfinder in second place, then maybe a little Pathfinder and a little Star Wars.