"Pre-mortum" of the summit
There are two ways to approach reducing the use of high-cost, low-benefit procedures. You can have the government tell people what they can and cannot have. Or you can have individuals pay for a larger fraction of the medical procedures that they consume. It really comes down to those choices.
Advocating either one of those is political suicide, and talking about anything else is a waste of time. The Democrats will not advocate government rationing, and the Republicans will not advocate scrapping most of our current system of third-party payment in medicine. Instead, the summit, like the entire "health reform debate" this year, will be a waste of time.