Unity Performance on PC

Hello everyone!
Theoretically, if i’m use good graphics shaders, can my online-multiplayer game run with good performance on medium PC?
I know that mobile Unity games works perfectly, but what about PC ? Shall i optimize every detal or Unity PC optimization already good? Maybe some Unity AAA-Graphics PC game already exists?

As with any project, you should always focus on optimising your game, no matter what platform.

Just absence of AAA-class PC games, made with Unity, raises doubts…