Such devices would be great from the user point of view, but not so great if you want to make money from them. Apple have proven that walled gardens will make y

Such devices would be great from the user point of view, but not so great if you want to make money from them. Apple have proven that walled gardens will make you tons of money, while a lot of manufacturers, that provide more open solutions, struggle to survive. It's not so much of a technological problem as that ad-hoc and general purpose computing/networking is notoriously hard to monetize.