For any object to turn in a circle requires acceleration toward the centre of the circle. The extra forces on an aircraft undercarriage alone would mean all aircraft would have to be retro fitted or engineer checked. Landing a heavy at 250 tonnes, 165 kts, with an acceleration toward the terminal on a banked track is going to hammer the gear!
Also what of wake turbulence from preceeding aircraft? It will be blowing across the circle at some point? Turbulence from a banked runway with a crosswind? Again, irrespective of how light the winds are there will always be a crosswind somewhere!
Rejected take-offs, what happens to the other 2 aircraft on the centrifuge? Critical engine failure thrusting toward the outside of the turn on the good engine??? :O No thanks!
How do you line up for a landing when you don't know how long the aircraft behind or the aircraft in front need for a take off roll???? Approach paths? Stabilised approach criteria???
It's once again something drempt up by someone who understands physics but hasn't applied that understanding to the greater and wider aviation picture.