Oh absolutely Munkeh, I totally understand. That's really a part of my point -- Sony doesn't want to give people the feeling they're buying a Computer, they want them to feel like they're buying a Video Game system, because a Video Game system gives people the sense of mass-marketed appeal and stability that you just mentioned.
But again, if you have a machine that uses a keyboard and mouse, and gives you access to the internet, as well as to pictures, movies, music, and games, what would you call that? It's dangerously close to simply being called "a computer that can't be upgraded." It's not an issue of functionality here, it's one of image. As I'm sure you're aware, many people have already mocked the PS3 with the "might as well just buy a PC" smears, and it would only get worse with a keyboard and mouse.
Consider this: technically, all video game consoles really ARE computers that have traditionally focused exclusively on games to keep costs down. These computers can't be upgraded, so you're forced to buy a whole new computer every 5 years or so. Think of that -- it's precisely how video game systems have worked since the beginning of time, it's just marketed so well and it's so user friendly that you really don't think of it that way. And that's the problem Sony is bumping up against now: they've added so many bells and whistles to their console that they're getting dangerously close to being considered a computer by the masses, and not just by those noting the technical definition. The IMAGE of video game systems as "not computers" begins to break down.