Isn’t it more likely it will be possible to compile and run current C code on 22nd century hardware (possibly on some virtualization solution) than that it will be possible to compile and run FPGA code on 22nd century hardware?
The same code can be easily target another FPGA as long as you don't use any vendor specific primitives or IP cores
The Wii came out over 17 years ago and third party companies still make controllers for them. Maybe that will still be the case 40 years after release, but eventually nearly all Wii consoles will stop working. Will there always be a big enough market of people playing Wii games on emulators to justify making those controllers and peripherals? I hope so, but am not sure. There near certainly won’t be enough demand for 3rd party Wii balance boards, which I can honestly live with, but I do hope the main controllers themselves are still available for purchase or possible to make out of other hardware available in the future.