FPGAs for robotics vision camera with 10Ge interface (10 gigabit ethernet)

In all your calculations you've forgot the NRE-Costs. 10Ge-IP-Core costs already 15-20000$!

How big can the camera be? I mean, I would do it in this way:

Sensor -> Cyclone GT/GX/SX (SoC) -> PCIe-Host inside of FPGA -> some intel x540 10Ge-Card -> ... -> HOST PC.

Then you have to deal only with Sensor-to-FPGA interface and PCIe Interface and driver framework (Linux driver on SoC). No 10G-Interface, no phys, no headaches, no IP-core-costs. PCIe is for "free".

So, go to ALTERA Cyclone 5/Arria 10 SoC devkit, plug in the Intel PCIe X540 network card, design a small adapter board for your Aptina sensor and there you go.

Anyway, its big -- hardware AND software/driver takes some one man year of development, maybe more with custom PCB.

p.s.: sorry for my bad english