Styles have just been made up by PG by combining certain RTs & RDs.
RTs & RDs all have the midi notation now so with all that in a database it could just search for similar RD,T from a midi file song you drop in, same way EZ bass, drums, keys does, Biab could create a Real style that is near the same to your midi target song.
This way you are not limited to a style PG made with particular instruments.
With so many styles, RealTrack and RealDrums to look through this way would be quicker.
Also to have Tap2Find, like I said if I saved a small sample all the RealChart midi from all the RT Basses and put it in EZbass I could find the RT bass I need very quick, same with the RealDrumCharts I would find the RealDrums I need with Tap2Find:

https://www.youtube.com/watch?v=JspY3IfmW0I


https://www.youtube.com/watch?v=sACTiNM7cAs