Making a GPU would require a lot of investment. You basically need to be a company like Intel or Apple to foot that kind of bill.
New companies are just designing ASICs for mining. The design is more simple and you don't need to worry about having to compete against AMD or Nvidia and trying to claw market share away from either.
New companies are just designing ASICs for mining. The design is more simple and you don't need to worry about having to compete against AMD or Nvidia and trying to claw market share away from either.