"At Google we believe that open systems win. ... Either way, a well-managed closed system can deliver plenty of profits. They can also deliver well-designed products in the short run — the iPod and iPhone being the obvious examples — but eventually innovation in a closed system tends towards being incremental at best... In an open system, a competitive advantage doesn't derive from locking in customers, but rather from understanding the fast-moving system better than anyone else and using that knowledge to generate better, more innovative products."
(4500 words, Jonathan Rosenberg)