Update: The Marty-Runbeck news conference revealed one other detail, at least: Under the Dollar Dome Deal, the Vikings would not be obliged to play there. They would have to agree to stay in Minnesota for 25 years, but the Dome would be theirs to do with as they wished. Sens. Marty and Runbeck pointed out that the old stadium has a new roof and a new playing surface – and that’s true, as far as it goes. But it’s hard to imagine that the roof and the field would survive any renovation.