i have a crappy system without a GPU and 4GB ram. bogged down the system a couple times, even when limiting detail.
memory usage went up to 567mb when rendering this.
Put the thing on a stick and it might pass of some sort of cotton candy (the material gives a light and airy feel to it).
And yes, microdisplacement is going to take a lot of memory until a developer implements a geometry cache system (and there’s no sign of it coming soon).