My suspicion was Nintendo would repackage the work they've done with NES and SNES Mini into apps for the Switch. Here's hoping they add a SNES app to the basic subscription and then add further apps in the future - I'd be willing to pay a higher subscription if it gave me access to software libraries for different Nintendo systems.
I don't know how the Emulation is being done for the Switch, but be assured, that SNES and more will follow.
Intel Core i7 8700K | 32 GB DDR 4 PC 3200 | ROG STRIX Z370-F Gaming | Nvidia RTX 2080 Ti 11GB VRAM | Asus PG27UQ gaming on 3840 x 2160 @120 Hz GSYNC HDR| HTC Vive Pro :3
Reached PC master race level.