Virtuix's Omni treadmill is very alluring to virtual reality fans who want freedom to walkwithout the fear of tripping over cables or running into walls. However, it's also massive and complex... and that's forcing the company to scale back its ambitions. Virtuix is telling its Kickstarter backers that it's cancelling all Omni pre-orders outside of the US, as the logistics of shipping the treadmill are just too much. It's not just the 175-pound, 48- by 43-inch shipping package that's the problem -- it's honoring regulations and maintaining enough replacement parts to handle a global audience. The initial plans to ship worldwide were "naive and unfeasable," the startup writes.