A Nokia's official statement about this can help to give more confidence to users and future users that their devices will not be get prematurely old. Because not all the software stack is free, Nokia is the only one which can make a sentence on this direction.
The lack of this statement from Nokia is perceived from users as "Nokia N900 will not support maemo 6". I asked this question on the IRC and I was told that this support is not on Nokia plans. If the answer is yes, an statement from a relevant Nokia employee can be enough.
