It already had its premiere in Monaco last year, but composer Tod Machover's new opera, "Death and the Powers," has now finally made it to the United States. Why are we reporting on a new opera (rather than Opera) on Engadget? Well, it just so happens to feature the "Operabots" pictured above, which were developed by MIT's Media Lab. The lab also helped develop some of the opera's other high-tech components, but it seems like the Operabots are the real standout -- they're "semi-autonomous" and freely roam around the stage throughout the opera, acting as a Greek chorus. Not surprisingly, the ope