Another evening, another interesting event.

Eric Schmidt, Google’s executive chairman, chatted with the Wall Street Journal‘s Walt Mossberg and Kara Swisher at the 92nd Street Y here in New York tonight.

Their conversation touched on the so-called “Gang of Four” (Google, Apple, Amazon, and Facebook), the importance of the mobile sector, technology in education, patent wars, quality journalism,  and — yes — PSY.

Here are my Tweets, in reverse chronological order.

To sum up, Schmidt @ #92YDigital: Gang of Four persists. Huge potential in mobility. Innovation key. "Patent wars are death."Newley Purnell

Schmidt says future biz might involve celebrity driven news brands. In online world, people care what celebs think. #92YDigitalNewley Purnell

Schmidt: promise in digital-1st approach like @ Politico and HuffPo. And established brands like WSJ and NYT will survive. #92YDigitalNewley Purnell

Summing up: Schmidt at @ #92YDigital: Ailing newspapers means less investigative journalism. That’s bad…Newley Purnell

@EricSchmidt says @HuffingtonPost and @Politico are innovative news models of journalism’s future. #92YDigitalKhadeeja Safdar

Talk over. Will share a few final thoughts from Eric Schmidt on quality journalism…Newley Purnell

Asked if Google would buy Twitter: Schmidt says can’t comment on M&A. But bullish on Twitter. It’s “place where news breaks fast.”Newley Purnell

Schmidt: Next big thing: more mobility. Innovation possible w/ devices is incredible. Also: big data. Getting closer to true AI.Newley Purnell

Schmidt: we don’t talk about future products and services specifically but “we have a lot of stuff coming.”Newley Purnell

Schmidt on self-driven car: better to think of as autopilot. Will have button to disconnect. Doesn’t say when thinks cars’ll be mainstream.Newley Purnell

Schmidt on tech in ed: massive online courses are just version 1. Very little innovation and competition in K-12. Hopes can change.Newley Purnell

Schmidt on @Google cars: “it’s an error that we drive cars. A 100 year old error.” Likely scenario: car companies use some features.Newley Purnell

.@ericschmidt says @Google’s goal is to be at the center of the information revolution. #92YDigitalSree Sreenivasan

Schmidt on PSY and Gangnam Style: he is “truly expression of a new form of celebrity.”Newley Purnell

Schmidt: “Patent wars are death.” Bad for innovation. And annoying.Newley Purnell

Schmidt: survey shows there’s 4x as many Android phones as iPhones. Mobile is where it’s at. Bigger than PC industry and growing.Newley Purnell

Schmidt: “Apple should have kept with our maps…what Apple has learned is maps are really hard.”Newley Purnell

Swisher: w/ Facebook’s stock struggles, is it Gang of 3.5 now? Schmidt: No, 4. FB has 1 billion users. You can make money off that.Newley Purnell

From 8 p.m. EST I’ll be sharing tidbits from 92nd St. Y talk w/ Google exec. chairman Eric Schmidt, @waltmossberg, & @karaswisherNewley Purnell