Roubini's paper argues AI/tech innovations will drive a US productivity boom, adding 0.5-1.5% annually to growth, pushing potential GDP to ~4% by 2030 despite tariff drags (tech trumps tariffs). US exceptionalism persists via leads in AI, semis, robotics. Stock market isn't bubbly—S&P fair value ~8,500-9,300 with higher earnings. Debt sustainability improves; dollar privilege endures via equity inflows, with temporary weakness. Short-term slowdowns, but long-term thrive.