VR in it's current form has many flaws. The resolution, while pretty good, is closer (relatively speaking) to flip-phones than it is a modern smartphone. The headsets are a bit too heavy, the FOV while good isn't great, the wires are annoying, and you need a beefy computer to power them. And of course it's expensive.
What it is not, is sickness inducing. The technology, as it is now, does not cause nausea. I suppose someone extremely sensitive could feel unwell after using it for a while, but for the average (or indeed even for most fairly sensitive people) the technology itself will not cause sickness. Now, some software for it certainly *can* induce some pretty gut-wrenching nausea, if it wasn't developed properly: developers are used to flatscreen 3D programming, where you can do horribly unnatural camera movements that'd make the most iron-stomached person upchuck in VR (I mean, some games on flatscreen monitors can make people nauseous). But the technology? No, nausea is solved from a hardware point of view. Of course there'll be naysayers, especially on Slashdot ("less space than a Nomad", anyone?), but VR isn't a gimmick, it isn't 3D TV (though ironically it's probably the best way to actually view 3D movie content), it isn't the VirtualBoy, it's a gamechanging technology. Which also isn't to say it's about to change the game anytime soon. Like any early technology, it's a few generations away from really coming into its own, but it's already well on its way.