Ask not what you can do to your cables; ask what DSP can do for your speakers....
I think this is a very important technology, SQ wise.
Some speakers have it all built-in (Kii) and there are add-ons available too. I am curious what DSP systems can now (beyond the obvious like freq. response).
One specific I seem to recall is that no or very few systems can do channels independently (e.g. if you have an asymetric room - like I do).