It would be difficult to deny that Kevin Cunningham, the executive artistic director of 3-Legged Dog in New York, has been on the cutting edge of merging technology and performance. He finds himself at an interesting crossroads. Fresh back from premiering new work at the Sundance Film Festival, 3-Legged Dog is in the process of vacating their Lower Manhattan headquarters after being forced out by their landlord, the MTA. Manhattan’s loss is Brooklyn’s gain. On Friday’s “Leonard Lopate at Large” on WBAI, Kevin Cunningham of 3-Legged Dog talks about his plans to open a virtual laboratory for conceiving large-scale immersive performances rooted in cutting-edge technologies.