One of the ways a large company can squash competition is to release vaporware, a product they don’t have, aren’t serious about developing, but want to prevent their smaller competitors from selling.
Since a company’s stability is always a factor in IT procurement, large companies have an inherent advantage. (Although whether large companies are more stable is highly debatable.)
This was brought to mind by Tony Byrne’s post about Oracle’s non-announcement about a major ECM initiative. Editors can fight vaporware by refusing to run non-announcements from large companies and reporting on new products from small companies. This kind of anticompetitive tactic will not work if it is starved for publicity oxygen.