I would also like a flying unicorn.
Seriously, a high power SBC at a reasonable price point would be insanely useful for projects like portable MAME cabinets, video transcoders, scene displays, etc... I love the Pi but it's so old tech, especially the video cores, that it's annoyingly limited for some applications. Worse, the competitors with faster cpus often have worse video acceleration support, making them worse for this than the underpowered Pi.