It’s a story literally as old as the iPhone itself. What if, like a computer, your iPhone could dual-boot with Android? It’d be the best of both worlds, right?

Well Nick Lee, who also worked to put Windows 95 on the Apple Watch, may have the answer. He’s built a case which only looks a little bit thicker than an off-the-shelf iPhone battery case.

Lee’s case works like this: there’s a separate board and battery behind the case, and it runs Android externally to the iPhone’s hardware. Essentially it’s treating your iPhone as an external display for his own Android-capable hardware.

So is it elegant or practical? No way in hell. But could you someday have a case that runs Android and outputs it to your iPhone screen? Maybe.