The wireless requirement will probably be the most annoying, as you'll have to deal with batteries, charging, figuring out how to get the two halves to communic

The wireless requirement will probably be the most annoying, as you'll have to deal with batteries, charging, figuring out how to get the two halves to communicate with each other and/or register as separate devices, etc. But it's certainly possible. Believe it or not, there are folks out there creating their own curved keyboards. See the following for an example. https://github.com/adereth/dactyl-keyboard https://github.com/adereth/dactyl-keyboard