Flight of Fantasy?

A Dutch engineer/student/nutter (delete as appropriate) has come up with an idea for a circular aircraft runway.  I find this quite intriguing, groundbreaking and potentially useful but in reality it will never make it to full use.  ...but what do I know?  Obviously I am a bit conservative when it comes to things like this and although flying has not been around that long (was it 1920 or thereabouts?) I know enough about flight theory to be quite skeptical regarding this.  ..but time will tell.  I didn't think I would live to see driverless cars on the streets.