Lenovo's unique new Yoga Book is already making appearances in variants bearing Microsoft Windows and Android, but a third OS seems to be in the cards in the near future. A few new code commits in the Chromium repositories seem to point to a Chrome OS version of the Yoga Book. A Lenovo device by the nickname of "Pbody" is mentioned in numerous commits, and many of those commits seem to point to the Yoga Book. Coincidentally, Lenovo is rumored to be adding a 12-inch variant to the Yoga Book family, and Pbody is supposed to be a 12 inch device. The most recent such coincidence is a commit pointing to the same kind of haptic feedback that can be used to simulate key presses on a touch surface, such as the haptic feedback used with the "Halo" virtual keyboard found on the bottom half of the Yoga Book.
Sources over at Chrome Unboxed have been following commits related to Pbody closely, and a quick glance over said commits will reveal that the device is from Lenovo, is to be a 12-inch convertible, will have haptic feedback, and will boast an Intel processor of some sort in the Skylake lineup. Speculation would point to the same fanless Core M processor found in a number of 2-in-1 devices, but it could also end up sporting the same Intel Atom Cherry Trail processor that sits in current versions of the Yoga Book. Haptic feedback could refer to simple vibrations, but could also mean the kind of advanced micro-vibrations that can make a touch keyboard more usable, and with most evidence pointing to the Yoga Book, this is most likely the case.
Given the $499 to $599 price point for the current variants, the Yoga Book's status as a premium convertible, and Chrome OS's recent shift to focus in on Android app compatibility, a Chrome OS version of the Yoga Book makes a lot of sense. At this point, however, the only real evidence toward such a device is the numerous commits referring to Pbody and features found in the Yoga Book, as pointed out above. Lenovo has yet to announce such a variant, but it certainly seems that a Chrome OS Yoga Book or a very similar device running Chrome OS will be hitting Lenovo's assembly lines in the very near future.