Maemo 6 isn't a device, its a platform or operating system. And my estimate is that first devices for M6 are announced in 2010Q4, so lot of things can happen before that.
I think Maemo 6 would be announced much sooner than that. It is very like that it would be announced in the maemo summit scheduled on october this year in Amsterdam.
That being said, this device is not a game changer. Its a mee-too. Which is great. It'll force the innovators to innovate more.