Nice idea, but real products don't come from MS Paint drawings and dreams.
Look at the time that has been put into products like the FPGA Arcade to even get compatibility with AGA in hardware. This is being done by many people who are effectively doing the dev work for free because they love the platform.
Is there a market for a version of the FPGA Arcade that connects to a LCD and is housed in a PSP-style casing? Maybe, but I think that potential customers of this would just buy an existing handheld console that supports UAE (GP2X, etc, do IIRC).
That IndieGogo project is going to stay at $0ยท00.