It's not clear when you'll see the switch, although there should be a slow transition rather than an abrupt rebranding. However it happens, it's definitely a big gamble for Lenovo. While it's a big mobile brand in China and a few other parts of the world, it's only really known for PCs in regions like North America. Motorola, meanwhile, is still well-remembered for its StarTACs, RAZRs and Droids on this side of the globe. There's no guarantee that a "Moto X by Lenovo" will be as attractive as its Motorola-branded predecessors, no matter how good the phone itself might be.