[acdha]

Do you believe it's reasonable to assume that AES performance will remain constant over the same 5-7 year timeframe? That's at least a couple of hardware generations for an improvement they could make in the current generation if there was a market for it.

[pbsd]

There is certainly room for improvement, but I don't see an 16x speedup happening on a 5-year horizon using the current AES-NI instruction set.