One key difference with the XPS 12, which shows an October, 2015 date -- presumably when the device will launch or become available -- is a high-resolution 4K touchscreen with Dell's InfinityEdge touchscreen.
The 3840 × 2160 resolution would trump that of both Microsoft's current Surface Pro 3 and the Miix 700, making it a fantastic media consumption device. Clearly, it's not just for play-time though.
While the specifications don't indicate which chip will power the Dell XPS 12, it will reportedly be available with Dell's Active Stylus. The hybrid tablet will also have a Thunderbolt 3 port and, of course, magnetic keyboard with backlit keys and touchpad. Dell's alleged spec sheet also suggests the XPS 12 will run for 10 hours on a charge.
But I'm likely very early in any potential transition or trend: It's still a Windows world for most people. And it looks like that world is about to expand with even more 2-in-1 choices thanks mainly to Microsoft taking the lead with its Surface and Surface Pro products.