Ok, let's deal with reality here.
News sources live and die by the attention they are paid. They want readers and viewers, so that they can make money off of advertising. In order to do this, they have to be on the story of the day, and even be ahead of it, on that story before anything else. In this, if there is a theming or coloring of the information to set up a great payday down the line, it is beneficial to them. And in this, this is where the payout for "Sony is doomed":
1. By saying it now, and if it happens, you look like you are ahead of the curve. Of course, when writing about "Sony is doomed", you write it usually couched and hedged so you can backtrack later.
2. Also the "Sony is doomed angle" provides fodder if Sony does make a comeback. You then prime the pump for a great return to greatness article.
So, it is the interest of the media to say "Sony is doomed". It generates attention, like is seen here. It gives the information a story, and draws attention to everyone. It also is a neat dig at Microsoft. You can play Microsoft up as the guys who twirl their moustaches, and put the girl in distress on the train track. This talk reminds me a bit of how you had the Fox News set blaming the Hillary Clinton camp for leaking news against Obama that was supposed to be bad. You get to set up Hillary as the evil-doer again.