We don't know if both capabilities will be in one and the same device, but looking for a trademark on "Stadia" implies some sort of physical activity. The device could possibly be a phone, and, given the fairly complex features, it might be a smartphone with Moto's beloved Android. Gingerbread has built-in native support for all kinds of motion sensors, which can take gaming to a whole new level. Android 2.3 even includes barometer support now, and the patent application filing does mention "altitude" as one of the aspects being measured, so if we have to guesstimate where the "Stadia" device(s) will be heading, it will probably be the Android way.
Granted, these patent filings are usually so broad, and the wording all-encompassing, that it could mean anything, it's just not in Motorola's tradition to file such lengthy and detailed applications. What do you think?