What part of 'This is a useful feature for Joe Public, it would be good to have it' don't you get? I chose the n900 knowing full well that it was missing this feature (unlike the poor souls who apparently were told by Amazon US that it did before they ordered!) I'm not jumping up and down demanding it. I'm seeing the value for many use-cases, and waiting, calmly and patiently for someone to develop it.
But neither am I saying "people shouldn't waste effort on this because I don't want it." You know what? No-one should make any effort whatsoever to improve Ovi maps or the GPS experience. And voice-turn-by-turn is a complete waste of space. Everyone should live in a place where they can find their way around and be able to read a paper map, just like I do. Who needs GPS? I don't! See... that's how it sounds.