Advanced Pison Engine?
As MFS has said, I think it will be a long time before we see a jet engine in GA aircraft, because of the cost of the powerplant. Even turboprop engines are out of the range on most GA owners, in spite of their ease of operation.
I think the first step will be to have an advanced piston using FADEC and a single lever (power+mixture+rpm) control. When aircraft engine manufacturers can offer us the convenience and economy of a normal automotive engine with the reliability needed in an aircraft, that will be a huge leap forward.
Still hoping.
O.J.
PS What ARE those Honda engineers doing?