There's a useful set-up video over on Alcatel's channel about how to set up the bundled VR Goggles that come with the IDOL 4S with Windows 10. Yes, I know it hasn't been formally announced yet for Europe and the rest of the world, but surely it can only be a matter of time now? Of course, VR on Windows 10 Mobile is probably a poor relation to that on other platforms, but as I showed recently there is decent content out there.
Here we go then. Consider all this a foretaste of what you can get up to with the IDOL 4S when it's released for more people across the world - though do note that it's all really just a matter of convenience, since you can do much of this just as well with a generic VR viewer and a Lumia, for example.
As a bonus, there's a companion video showing how to navigate VR content when wearing the Goggles: