This new heat sink / fan is like the heads in the hard drive: it floats on a thin film of air. Consequently, it does not need any conventional bearings. The video describes it as "using an air bearing".
It isn't an air-bearing by any normal use of the term.
It still needs a radial bearing to attach it to the motor - especially if you aren't mounting this perfectly flat and level. It can use an air cushion effect to reduce the planarity demands of the bearing to keep the heat transfer surfaces parallel - but this is very different to 'floating' a 10mg sprung drive head
