O.K. In reality, this isn't a new product by any means. I do think that this product category could benefit from the PSP Audioware touch though.
How about a plug-in (or suite of plug-ins) that handle time-compression/expansion as well as pitch-shifting and tuning? It would be best, in my estimation, to have one plug-in that does is all and has a simple interface. A plug-in that does everything that Auto-tune, Pitch 'N' Time, Soundtoys do; with a simple interface (unlike Pitch 'N' Time, yet more like Speed) and then add the PSP twist on it...