"Business secretary Peter Mandelson is slimed by an environmental protestor outside the Royal Society on Carlton House Terrace, Pall Mall after allegations of 'favours for friends' over the Heathrow third runway decision" [Courtesy of "Plane Stupid", via Wikimedia]
At this point it would be rather foolish to assume that IBM will let Red Hat just "do its own thing" or maintain its corporate culture, identity, projects etc.