Actually as I was watching them put the bubbles in I was thinking that they'd probably help cooling. Instead of using fans to cool components all you'd need would be to pump air down to spray bubbles over the heatsinks!
As the bubbles splash to the surface they would gain a large surface area for the oil to dissipate its heat.
As the bubbles splash to the surface they would gain a large surface area for the oil to dissipate its heat.