Sysex editing opens up one BIG possibility for VSTi creation. Midi editors or better yet, sysex librarians where you can load a patch to your synth from HD, which basicly means unlimited patch storage for your synths.. and ofcourse total recall !
This leaves you with best of both worlds. Total recall of the softsynth world and the better sound from hardware synths. I'm nearly finished with my editor/librarian for the Waldorf MicroQ and am going to do a simple librarian for my NordLead, Novation Nova and perhaps TG77 and JV1080. When i still used a digital mixer sysex handling would've also enabled me to have unlimited space for mixermaps and a better way to archive whole projects. I really dig this feature