Russia is a top 4 country and they will stay that way even if they don't win a single game in this tournament.
Canada
USA, Sweden, Russia
Finland, Czech
Slovakia etc
In my opinion, being a top class country is less about a few games and more about current talent produced. Finland for example is a top level team, but they don't have the talent - trending up as they are, there are ways to go to catch the 2-4. Russia has the talent, they have not been able to get it together as a national team for awhile. All it takes a single 'click', and there they are.