When the N900 gasps it's last breath I will look around and see. At the pace tech is moving now its hard to ever say what I will be able to buy in a few years. Nokia makes good hard ware ... so a guess would be either a Nokia or HTC based device due to build quality. T-Mobile cause thats my prefered provider and unlocked device when I buy it. OS ... WM7 more likely than not. Not an Android fan, and my wifes HD2 W7 isn't that bad at all to use.