Personally I don't care that much. Current processors are plenty fast as it is. I mean, it's always nice to have faster ones and I don't think there will ever be a point where everyone is satisfied and we stop improving them, but I'm just not CRAVING for more speed so much.

However, what I'd LOVE to have is ubiquitous availability of very fast persistent storage. It's really a pain to deal with the relative slowness of hard disks.

Something like memristors would be a solution. http://en.wikipedia.org/wiki/Memristor