When are 5 GHZ processors going to be commercially available without overclocking?

Good question. I have also noticed computers in the real world aren't as fast as the specs on the CPU's would imply. I remember the switchover from Intel's P3's to P4's and it was an enormous difference, not like the seemingly incremental improvements of today. I think part of the problem is the operating system. MS hasn't fully optimized Windows 7 for multicore processors. Clock speed seems to have been brushed aside in pursuit of more cores for the sake of power and cooling. Clock speed does improve everyday computing more then just adding cores. The other problem is that they need to change to graphene substrate as you suggested. As soon as they switch over to graphene we will be seeing cool, power efficient CPU's running over 10 Ghz. When that will be I can't tell you but I have heard it should be in the next two to three years.