I'd like to chime in here and send people who are interested in good Piano sampling libraries over to a most useful website that compares practically every piano sample library available for Gigastudio.
The site is:
http://www.purgatorycreek.com/pianocompare.html There are probably forty different mp3's of the same minute and a half long midi file being played into Gigastudio with everything from the GigaPiano to the East West Steinway and Boesendorfers. There are also quite a few good hardware module/keyboard comparisons, some soft synths, and of course William Busch's studio Steinway B.
Everybody who's designed a Gigastudio Piano claims it's the best thing ever. And they are spectacular - they give you as many as eight stereo layers per key (four pedal down, four pedal up) and are quite expressive and of course, never looped. But there will always be some failings in a sample library, especially when it's produced with one guy in charge. The really cool thing to me about VSL (okay, one of many cool things) is that it's created by a team of amazingly intelligent and thoughtful musicians who somehow manage to explore every possible problem and question about the sampling process and actually come up with solutions.
There have been technologies designed to emulate string resonance, and to model the aspects of repeated notes affecting a resonating string, and there are many effects processors (including the Korg Triton) that have a "Piano body/damper resonance" effect. But few of these have ever led to a more playable or more perfect sounding piano sound, usually because they have only augmented the limited nature of small scale keyboard sampling. But besides these techniques and large samples and many velocity layers, I could imagine there being a set of "performance tools" to implement special techniques for the total all-encompassing piano library.
But I also hardly see the point: In my mind, the idea of the performance tool is to translate the way one instrument works to the interface of a keyboard controller. A piano already is a keyboard instrument, and if the sampling technology can only get the sound 97% there, I think that's fine. I can't really
play the piano without strings resonating in front of me, even on just an upright. I play completely differently on the real thing than on a keyboard. But maybe now I'm putting my foot in my mouth...