I haven’t used it for a while, but the last time I was using Lakka I don’t think it had been ported to Pi yet. It worked great and was very much for PCs. I don’t know about interfaces though; my install booted straight into RetroArch which isn’t the slickest-looking thing but worked fine for me.

Make sure to check compatibility lists for the emulators you want to use. You may be surprised by how many games don’t run/can’t be finished/have major glitches on later systems like PS2, PS3, and GameCube. Also, there’s no PS3 RetroArch cores, so you’ll need to use the standalone version of RPCS3.