I, too, find the current concert "formula" terribly old-fashioned. I mean when you consider the strides technology has made in just the past 20 years, the changes in the "details" of our everyday living, the absurd new politics of terrorism, etc. walking into a concert hall is like a step into the past.
Maybe that's why people like it the way it is. I don't know. I find it very boring at times. This is the "formula" that's been pretty much it, for the past 100 years. I was looking at various programmes that Backhaus gave way-back when, and they were, yes, monumental. But basically the same programmes we hear today. Who cares to hear another appasionata? or the goldberg or the diabelli? who cares?! Unless maybe it's one of your favorite pianists playing them. And I don't know if the answer is contemp stuff. I read some very interesting programmes that Jonathan Powell gives. They're enticing, but is that the answer? Maybe the "concert" era is dead. At least the reactionary way we consider it.