After all those months of leaks and rumors, the Moto X is now a real phone that we can talk about and find fault with. Feels good, right? The device is going to be for sale through all the major US carriers, but that's not your only option. For a more Google-y experience, a Google Play Edition Moto X will be up for sale in the not too distant future.
The Moto X has reasonably good specs toward the medium high end, but does a lot of neat things with it's power-efficient X8 computing platform. The phone won't be completely stock if purchased from carriers, but the Google Play version should be free of carrier crapware and influence. Some (or all) of the color customizations might fall by the wayside, though.
If the other Google Play Android devices are anything to go on, the GPE Moto X will be an unlocked GSM device for AT&T and T-Mobile in the US. Pricing and storage options are not available. Better start saving your pennies now just in case.