I'd hardly call lack of voice navigation a "killed" device. If I had it I wouldn't use it. N900 makes for a poor in-car navigation compared to dedicated devices, so I went ahead and installed one of those. Cheap, too, considering the price of an N900.

Besides, I can never navigate by voice only. I drive a 3-liter and by the time it says "ding, in 100 meters" I'm already passing the intersection if I'm passing someone or simply in a hurry. Voice synchronizes poorly if one doesn't drive at a constant speed. I need to visually confirm the route and the glaring N900 screen and low volume makes it hard.

These days a dedicated PNA sells for 1/8 the price of an N900, they're smaller, have better battery life and better software. And louder speaker (if not on FM). And dedicated car grips.

Personally, I moved for the in-dash touch solution. It feels more natural for the phone to be an addition to the car system not the other way around.