I get where you're coming from, but IMO, for the 99.99% of modern music where either the piano is sitting in a busy mix with other instruments and/or the piano is getting routed through a ton of compression, saturation, delay, reverb, etc to make it sound like a modern track, you really won't be able to tell whether it's a VSTi or live recording. True for both pop music and soundtracks. The only case anyone can tell a difference is going to be solo piano pieces that are intentionally made to sound as raw as possible, which is fairly niche.
You can bring this distinction back to recomps, too -- one area you can't use a vibed recomp over an emulator is things like TAS's[0], since the TAS community has strict rules about staying compatible with the original hardware, including doing things like sending the TAS inputs into an actual console to verify it works properly. A recomp is likely going to have minor (or major) compatibility issues that would prevent this from working. But it won't matter for 99.99% of players.