Speed will be one of the killer features once you get closer to instant speeds of 300ms. Just remember what changes were made possible simply by upgrading from ADSL to broadband.

If inference speed goes up, I can launch the same query 5 times, evaluate the best result and proceed from there. Of course, evaluation is also instant, so in seconds I can get a near perfect solution. Or maybe 10 and I can pick what I like the best.