Air Bearings How do they work? Example XY Air Bearing Stage, PIglide XY-Table

Air bearings provide very smooth and accurate motion They can be used in linear and rotary motion systems. XY-air bearing stages with the highest motion fidelity are based on a planar air bearing design driven by linear motors.
Air bearing stages provide extremely straight and flat XY motion. Air bearing stages are used wafer inspection and scribing applications, as well as other ultra-precision motion applications such as flat panel inspection.

[GoalOrientedLifting]

This is an amazing way to do the xyz gantry. But would a flooding system, with coolant, affect the machine in any way?

[marlonsaveri]

At 0:27, why a vacuum area is necessary? Is there any problem about when it works without vacuum (or, with just one Air Inlet?)

[Chaos------]

I could see this being used for say component placement on pcb's but you cant introduce any sort of load on the gantry. Which seriously restricts its usefulness.