Comment It's Not Sony, It's the Market (Score 1, Insightful) 107
Sony has not "gone open" in any significant sense at all; the only thing they deserve credit only for is making a good business decision. Think about it: when Apple started the iTunes store, they were creating the marketplace, so they went proprietary. Then Amazon came in to the MP3 market, and "went open" because they were the one locked out of the marketplace.
Same thing is happening with eBooks: because Amazon created the marketplace, they went proprietary. Now Sony wants to break in, so suddenly they're all about open formats. But it has nothing to do with Sony in general. You can bet that the next time they think they can get another Walkman, they'll go to the mat with another Betamax/VHS, Blue-Ray/HDDVD, etc. fight to the death over their latest proprietary format.
Sony 3's controlling proprietary formats, they always have, and they (almost certainly) always will. They just settle for open formats when they're late to the table.