I suspect the real appeal of the Supercell is for a small shop where the user doesn't want to have both a traditional dust collector (high volume, low static pressure) AND a "shop vac"/CT dust extractor (low volume, high pressure).
The Dust Cobra "sort of" bridged the gap with 200+ cfm and good static pressure, but it was really never up to the task for machines with 4" ports. The Supercell seems targeted at those machines with 4" ports (router tables, smaller jointers and planers, etc...), while still handling sanders, saws, and other machines that might use a 27mm hose.
Alas, my needs are at the opposite ends of the spectrum, as most of my machines have 5" ports and require 600-800cfm, or are better served with a CT-style machine. That being said, it's great to see Oneida continue to innovate, I hope some woodworkers out there find this to be a good fit for their shops.