I understand, I was just comparing the two cases (of N900 and N9) potentially.

The idea of hardware being the same, and different level of OS maturity, sounds good. At least consumers' device won't be physically crippled. (Hopefully it won't have any restrictions either, like on dual booting and etc. comparing to the dev device release). However if consumers device will come without a hw keyboard or will have some weird restrictions - I doubt it'll interest me.