Intel Edison Module
Personally, I love the idea of low-spec 86 chips being available at rock-bottom prices. It's an architecture that while far from perfect is well known, and most of us here have a boatload of experience with it I'll wager. I'd really like to see something similar to this but for 2 or 3x the price (it's only $50) that includes a framebuffer, hdmi and a fully documented hardware blitter or bargain-basement GPU.