The insurance companies stand to make a lot of money if it passes, and lets face it, the dow is mostly counting financial firms, not the "real" economy. The health insurance companies face one of two decisions - take on the new deal, or continue on with loosing customers as the number of under employed continues to rise. Pretty soon, the pain will sink in even for them.
The professional investors have already counted heads, taken the risk / reward into account, and programmed it into their computers. Since 50% of all daily NYSE transaction are done this way, then that means it is already programmed into the prices, and the investments are already made and hedged.
I can't actually tell if my family will be better off or worse off with it or not. Either way, it won't fix the worlds problems, nor end civilization as we know it.