Well, fpga it's just an instrument, technology you use to implement ideas in hardware.
You can focus in computer design, take a job in ARM and use fpgas for asic prototype of next generation CPU.
Or you can go to electronics engineering and use fpga to create new space telescope in Ball Corporation
You can do like me and choose radio and telecommunications specialization and implement in FPGA signal processing algorithms.
You can choose also math, or chemistry, or solid state physics.
Whatever option you choose, you will use fpga, microcontrollers, SoC, python, c++, tcl and many other tools in your engineering process. Don't focus just in a very small FPGA technology, think wider