This isn't right, either. In Intel's lineup the Atom brand is the most expensive brand using these cores. The Pentium and Celeron branded parts are the cheaper and cheapest ones, repsectively. "Atom" is basically the "Xeon" of its family.

I see it more as "really low power".

I've got a quad core Atom mini PC running plex and general file-server duties, and the thing is not only passive but sips energy.