Because the processing that can be done within a self-contained HMD is limited by power and thermal hurdles, Intel believes both markets (the self-contained HMD and the PC-connected HMD) will be viable, and will be driven by the applications and their resource demands.
I suspect we'll see both of those markets converge fairly soon. Really, there's no reason a headset couldn't have both self-contained functionality, and a wireless transmitter to work with PC/console VR. When used with another device, the standalone rendering capabilities could likely be used to perform things like perspective adjustments on the headset itself to match the latest positional data before it even gets transmitted to the PC, helping to cut down on perceived latency.
Jason - it's 802.11.ad at 60Ghz. Looks very promising and like the next gen is shaping up. So as accessories Vive has the new strap, integrated sound, additional trackers, 2 wireless solutions and a nice smattering of AAA titles. Just need an updated hmd, sleeker, higher pixel density and fov and we have something really special.
I figure it's just a matter of time before we see people watching movies in 4K on their smart phones. It seems society is diving headlong into the most vapid and pointless use of technology we can possibly imagine.