Sony's Project Field looks a bit like a plastic cutting board. It is thin, light, portable and brings compatible chip-embedded real-world objects in-game - similar to a Lego Dimensions, Amiibo, Skylanders or (RIP) Disney Infinity port.
But instead of connecting to a console, it connects to a smartphone or a tablet via Bluetooth. So you take it everywhere you go. Well, that's the idea, anyway.