Mechanical objects cannot follow Moore's Law. Newtonian physics has been a settled thing for 200 years now and while we can make improvements in materials science, the equations that govern mechanical design have no shortcuts.
A fluid bearing uses a fluid (in physics terms, this means either a liquid or a gas) to absorb the shock of impact and friction. The design of the bearing is dependent on the viscosity and other properties of the fluid. Basically, if you have two parts that should have friction between them, and put a layer of properly designed fluid in between, the friction between those parts becomes the friction between the fluid and the surface instead of the two surfaces.
The archetypal example is a connecting rod and a crankshaft journal:
In a fluidless scenario, the impact of the exploding gas on the piston is transferred down the connecting rod to the crankshaft and the inner diameter of the rod and the outer diameter of the crankshaft rub together, make lots of heat and wear. In a fluid bearing scenario, the impact from combustion is absorbed by the fluid, which has much lower friction than the two metal surfaces, and which is also under constant replacement by the oil pump. This allows the friction heat of the surfaces to be removed from the site.
That was more ELI10 but that's the idea.