They are even much less convincing to my ears, unfortunately.Instead of sampled, look into modeled piano plugins
(there were some discussions here, and i don't feel the urge to refresh them...)
The physics behind some things is much more complex than one might think.
Resonance buildups in a piano can have a very interesting (almost chaotic) behaviour.
That's one reason why it's extremely difficult to cut different takes of a piano recording:
You might play the phrase almost exactly in the same way, with the same pedalling, yet you have completely different overtone amplifications. The funny thing is, sometimes a cut might seem perfect but then you suddenly hear where the overtone content "jumps".