Special to the Director's Cut Blog Gary Levin, USA TODAY It's a generational shift at an icon of late-night TV: NBC's Tonight Show has anointed only its sixth host in its 59-year history. Jimmy Fallon will take over for Jay Leno late next February, the network confirmed Wednesday, after Leno is ushered off the stage for the second time in a 22-year run. With the handoff, expected just after a promotional push during NBC's Winter Olympics, Tonight will move back to Fallon's base in New York City from Burbank, Calif., its home for more than 30 years. And the show is being placed in the hands of executive producer Lorne Michaels, who created Saturday Night Live and has shepherded projects featuring many of its stars, from 30 Rock to Fallon's current Late Night. But wee-hours talk shows have diminished in stature and ratings, amid huge shifts in television viewing. Jay Leno (L) and Jimmy Fallon (R) Cable competitors have sprung up, and recorded shows co...