I agree the X3 may be a leading indicator of future mainstream mobile device usage patterns (just as the Motorola Atrix perhaps was, albeit way ahead of its time), but probably not of smartphone market success for HP. In other think-different mobile device news, see The CAT S60 is a smartphone that sees in the dark and swims with the fishes (PC World) -- that would be CAT as in Caterpillar
"That’s why I’m intrigued by HP’s new Elite X3. At first glance, the 6″, Qualcomm Snapdragon 820-powered device looks to be just another smartphone—a Windows 10 Mobile-based one, at that. But, in conjunction with some of the hardware accessories the company specifically developed to be used alongside it, along with the capabilities of Windows 10 Mobile’s Continuum features, the X3 can morph into a full-on, big-screen computing device.The Devices Formerly Known as Smartphones | Tech.pinions - Perspective, Insight, Analysis
Now, cynics will argue we’ve seen this before. Anyone remember the Motorola Atrix? Or how about Microsoft’s own Lumia 950 from last fall? Both notable but ultimately failed efforts to develop a smartphone form factor computer. The difference with the X3, however, is the focus and detailed vision. On the Atrix and Lumia 950, the computing features were add-ons to an existing smartphone. The X3 seems to be positioned and designed primarily as a computer, with the smartphone capabilities essentially built in."