There have been many rumors about what the successor to the Xbox 360 might be, but so far none have been from a reliable source...until now. A source famously known as "MS Nerd" indicated that the next Xbox will have an ARM architecture and will be based on Windows 9. He also mentioned that the Xbox 720 (name not confirmed) will be smaller and cost less than the Xbox 360. MS Nerd has provided good information before, so it could be very likely that these rumors are true.