As promised last October, NYC Transit has installed video screens on the platform in the Myrtle-Wyckoff station in Brooklyn showing the locations of every L train on the line, updated every 15 seconds. The system was unveiled to reporters yesterday, and L Line General Manager Greg Lombardi was on hand to explain this 21st century marvel to awe-struck commuters. The screens cull data from the L line’s cutting-edge computerized operating system, which tracks exact train locations; if they prove successful, Lombardi promises to expand them to other stations on the L line, so stranded straphangers will at least have something to watch while they seethe. But at least one commuter yesterday was unimpressed, telling NY1, "If they're broke right now, and they're cutting service, I'm not sure they should put money into something like this." An NYC Transit rep tells us the screens were bought at Circuit City (LG 42”) and the system cost "way less than $100,000" to implement.