Can you really benefit from this new skill? Because it is very different from GPU programming. In fact, it is mostly describing hardware in some very low level

Can you really benefit from this new skill? Because it is very different from GPU programming. In fact, it is mostly describing hardware in some very low level language. You must develop everything by yourself to make that eGPU functionality. All cards are good, you just need to pick right one for your application. Terasic has a nice range boards starting with cheap ones for beginning to advanced ones with high end FPGAs.