I doubt we'll see "massive performance gains" from the very first version of such a chip. The gains will come mostly the same way we saw Moore's Law in silicon.

I doubt we'll see "massive performance gains" from the very first version of such a chip. The gains will come mostly the same way we saw Moore's Law in silicon. So we'll get 5Ghz graphene processors, then 7Ghz ones 2 years later, then 10 Ghz 2 years later, and so on, until we reach TerraHerz a couple of decades later. Even if we do see somewhat big gains initially, it will probably have the price point to match, like we saw with SSDs, which were ~3x faster than HDD on average, but 10x more expensive per GB.