There's a bit of a difference since you can easily have multiple consoles as well as a PC, but you can't easily have multiple mobile phones, since it's very inconvenient to carry them, charge them, pay for multiple data plans, sync data, etc.

Consoles should also be forced to open up though, and there's no reason why that would "destroy the console ecosystem". They might have to raise the prices of the consoles, but everyone has to do it so it won't matter, and the consoles can also either be financed or monthly fees for online play can be increased.