I don't think it affects credibility of hundreds of cores per CPU at all. I think 32 cores is about as high we will go in the first phase though. Disk I/O bound applications can't be faster by throwing more cores at the problem. Memory bound applications will flat out around the 32 core limit and then we will have to split up the memory as well into several "banks". When that has happened, we can again improve up to some hundred cores.

There is no reason to "fear" having more cores and I don't think it will affect us so much people are stating it will.