Just like how they're called Orruks now in Age of Sigmar, apparently, the Eldar are now the Aeldari in 40k. The faction may have been around forever, but they're not looking old with these new Guardian figures that are coming for them.
From the article:
After all this time, Aeldari fans, the wait is over! New Aeldari Guardian miniatures are on the way!!
Let’s take a look.