One of the biggest changes in television history is when a new host is appointed to “The Tonight Show,” and it happened again for the second time in less than five years with the ascension of Jimmy Fallon to the show. Fallon replaced Jay Leno, who hosted “Tonight” for over 22 years.

Fallon has reinvigorated “The Tonight Show,” making it relevant for the first time in years. He did this during his first week as host, so imagine what he will be doing in the months and years to come.

Everything about “The Tonight Show starring Jimmy Fallon” is different than Leno’s version of “Tonight.” Leno’s show was very predictable with the same structure every episode: monologue, a throwaway bit, first guest then second guest interview, and end the show with a musical performance.

The structure of Fallon’s “Tonight Show” is very much the same as his version of “Late Night,” where the audience, and to an extent his guests, cannot guess what he has up his sleeve.

Unlike Leno, who seemed satisfied with his mundane show, Fallon is clearly excited about making people laugh. He explicitly said his “goal is to make you laugh and put a smile on your face” during his first monologue — consider that mission accomplished.

One of his tactics to make viewers happy has been the use of his trademark skits that usually go viral brought over from “Late Night.” The first was “the Evolution of Hip-Hop Dancing” where Fallon and his first guest Will Smith performed various dances made popular by the genre of music. Another was his barbershop quartet version of R. Kelly’s “Ignition (Remix).” Both of these bits were hallmarks of “Late Night with Jimmy Fallon” and it was a very good decision to move these over to “Tonight.”

Also brought over from “Late Night” was Fallon’s house band, The Roots, and his announcer/side-kick Steve Higgins. Both contributed to Fallon’s success at “Late Night” and will continue to do so during “The Tonight Show.”

It is very obvious this is not “The Tonight Show” for old people — this is “The Tonight Show” for young people, by young people. This is important because young people are the key demographic for advertisers; without them any show will fail.

Fallon has been beating his rivals, ABC’s Jimmy Kimmel and CBS’s David Letterman, easily in the ratings, with Fallon at times having ratings higher than Kimmel and Letterman combined. Fallon’s ratings will go down as his newness wears off, but expect him to become the new king of late night.

If Leno was expecting an NBC executive to bring him back to host the show for a third time, he should just given up hope on it. Fallon has cemented his place as host of “Tonight” and king of late night for the next several decades. He is our version of Johnny Carson.