Seems we are approaching limits as per how small can we make the transistors and how fast we can run them without melting them, so... are we gonna keep adding cores? Lets speculate about what could happen in the next 5 years or so.
I think we gonna add a few more cores to everything (CPUs and GPUs). And maybe more cache (CPUs and Disks). Maybe solid state drives will take off in mass... maybe not.