Telluride Film Festival takeaways include Julianne Moore and Paul Giamatti surging with "The Debut," and Nathan Fielder testing the doc branch.

Jesse Eisenberg's A24 comedy "The Debut" premiered at Telluride, launching Oscar bids for a career-best Julianne Moore and an overdue Paul Giamatti.

Premiering at Telluride, the film follows a meek New Jersey housewife who gets cast in a local production headed by a domineering director, and then increasingly loses herself in…