The Hobus Supernova created a whole new alternate timeline for Star Trek, the 2009 films, the Kelvin Timeline.
But why did it visually turn out so different?
Let's look at the in-universe reasons that the designs of Starfleet's most iconic ships, like the Enterprise were altered so radically.
As usual we turn to the books and games surrounding Star Trek to find our answers.
And they involve the Borg.

"Mountain Emperor" Kevin MacLeod (incompetech.com)
Licensed under Creative Commons: By Attribution 3.0 License
http://creativecommons.org/licenses/b...

Music from bensound.com, purple-planet.com and freesfx.co.uk
Star Trek Online developed by Cryptic Studios and Perfect World.
Star Trek, Star Trek First Contact and Star Trek Enterprise/Voyager/Deep Space Nine and The Next Generation are all owned by Paramount Pictures and distributed by CBS.
This Video is for educational purposes with commentary.