The future is now, if you believe Tony Stark-style billionaires. Tesla and SpaceX founder Elon Musk just Tweeted, "Just received verbal govt approval for The Boring Company to build an underground NY-Phil-Balt-DC Hyperloop. NY-DC in 29 mins." Pretty good—but remember you'll still have to take the F home, which will probably take twice as long.

Just received verbal govt approval for The Boring Company to build an underground NY-Phil-Balt-DC Hyperloop. NY-DC in 29 mins.
— Elon Musk (@elonmusk) July 20, 2017

City center to city center in each case, with up to a dozen or more entry/exit elevators in each city
— Elon Musk (@elonmusk) July 20, 2017

Musk's SpaceX has been working on a Hyperloop test concept and a competitor, Hyperloop One, has tested its LA-SF run.

Hyperloop first test!! pic.twitter.com/gnVowvS6Gk
— Ruth Reader (@RuthReader) May 11, 2016

Last week, Hyperloop One announced that they had conducted a test of its "multi-phase program" at their Nevada facility: "The vehicle coasted above the first portion of the track for 5.3 seconds using magnetic levitation, reached nearly 2Gs of acceleration (producing the effect of twice the force of Earth’s gravity) and achieved the target speed of 70 miles per hour (mph). In the next phase of testing, the target speed will increase to 250 mph. The next phase of testing will move the vehicle to a longer track, allowing it to achieve faster speeds."

Hyperloop One co-founder Shervin Pishevar said, "Hyperloop One has accomplished what no one has done before by successfully testing the first full-scale Hyperloop system. By achieving full vacuum, we essentially invented our own sky in a tube, as if you’re flying at 200,000 feet in the air."

Musk's earlier hyperloop plans proposed a 35-minute trip between Los Angeles and San Francsico, and currently SpaceX is building a tunnel in Los Angeles, promising that the usual 30-45 minute drive between L.A. and Westwood will take just five minutes.

[Warning, this may cause motion sickness or seizures] This is a test run of our electric sled that would transport cars at 125 mph (200 km/h) through the tunnels, automatically switching from one tunnel to the next. Would mean Westwood to LAX in 5 mins.
A post shared by Elon Musk (@elonmusk) on May 12, 2017 at 5:48am PDT

Update: Musk qualified his earlier Tweet, admitting that there's a long way to go for the project:

Still a lot of work needed to receive formal approval, but am optimistic that will occur rapidly
— Elon Musk (@elonmusk) July 20, 2017

And a spokesperson for NYC Mayor Bill de Blasio said of Musk's "verbal" approval comment, "This is news to City Hall."

Hyperloop Dreams: Elon Musk Says He Has 'Verbal Gov't Approval' To Build NYC-DC Hyperloop