$15K is on the pricey side, but for some industrial inspection tasks I can imagine this being a cost which can be justified. For just meeting folks in the office I'm not sure that many businesses are going to go for this. For casual use the cost is going to need to be lower, and from a hardware point of view there's no reason why the cost can't go much lower.
My biggest beef with this robot though is its mechanical design. There's no good reason that I can see why it has to be balancing on two wheels. As a technology the balancing system is fine, but it doesn't appear to be fail safe. If the robot suffers a failure, the most common of which will be battery failure, it should fail in a safe position. With a balancing robot if there is a failure it's just going to fall over and crash into stuff, generating a hazard and liability issues. Depending on the environment in which the robot is deployed, uncontrolled toppling could have very serious consequences (for example, starting a fire).