Nope! Netflix does 10G tls on commodity hardware in kernel space. CPU can do a lot.
It's hard for me to see the use case of an FPGA nic. The reasons outlined above don't seem compelling when a commodity nic like mellanox do so much more already.
This is could be useful for people doing testing and benchmarking on network appliances.
Corundum was originally geared more towards optical circuit switching applications, but it's certainly not limited to that. Since it's open source, the transmit scheduler can be swapped out for all sorts of NIC and protocol related research.