This year is shaping up to be the year of emulators. Never before have there been this many high-profile emulators in the works and never before has progress been this steady and significant.
The most interesting emulators to keep an eye on right now are Yuzu, Cemu, and RPCS3. These emulate Nintendo Switch, Nintendo Wii U, and PlayStation 3 games respectively.
These three emulators are working towards an amazing legacy; never before have emulators seen such steady and significant progress. The rate at which they are improving is impressive, especially when you consider that they each have their own unique difficulties to overcome.