The other pretty consistent theme is that none of those teams have two truly elite defensemen. Dahlin and Power are obviously not there yet, but the potential exists that they could be two players who are equivalent in impact, if not in style, to players like Hedman, Doughty and Letang.
That said, as much as I like to fantasize about the Sabres' current crop of players not just being a playoff team but eventually becoming a multi-cup winning team (like the teams you reference), that is probably not realistic. Every team and fanbase should have aspirations to be sure, and I want a cup as much as anyone, but my expectation is not that we become the next NHL dynasty (after the Avalanche?). More realistic is that if almost everything goes well we become the Nashville Predators, a team that consistently makes the playoffs and that has a couple of deep runs, or, dare to dream, the St. Louis Blues, a team who has it all fall into place for one glorious season.