Motorola puts a placeholder for the Moto X+1 on the Moto Maker website15
The eventual upgraded Moto X+1 all of a sudden doesn't seem so eventual, but what exactly will be the improvements that warrant the "+1" tag, remains still a mystery. We can reasonably expect bumped-up specs, whether in chipset, camera, or screen resolution. Alternatively, Motorola might have decided to bet on extra software functionality, building on the always-on environmental awareness of the Moto X. In any case, judging from this placeholder for the Moto X+1 on Motorola's site, the announcement shouldn't be far away.