This forklift uses the same technology you've seen used in the robot with omni-directional wheels. As somebody pointed out in the comments, these wheels are called mecanum wheels and have been around since '73 and are used by the US military for different utility vehicles that operate on-board aircraft carriers where movement space is limited. Very interesting!

Here's a fresh new design for wheels. The cool and ingenious part is that these wheels don't move sideways physically, but spin in opposite directions through (what looks to me like) inner ball bearings. Simple and very versatile!

This omni-directional treadmill represents a massive step forward in designing and developing virtual worlds. With the help of a VR head-set you can wonder around a virtual world, and get the feeling of the real thing! Amazing!