The EVE Online test server is currently testing a "significant update" of interstellar MMO images, although this may stretch the word definition a bit according to these comparison screenshots.
As of yesterday, the uniqueness test server began showing some changes in the coloration of EVE's skies, stations, and planetoids. In a blog post, CCP explains that the game's colors have become "brighter and deeper," softening the gradients and making adjustments to lighting and shadows to help the New Eden look a little less muted.
"These changes are part of a permanent commitment to improving the EVE base and shaping the game for a prosperous third decade. By removing the color gray, these updates will bring New Eden to life like never before."
That said, I wouldn't expect a dramatic overhaul. This feature before and after is perhaps the most visible example of CCP comparison plans, and is extremely subtle.
A little more contrast and a little brighter, yes. But it also feels like it's losing the sharp blackness of space and the planet almost looks a little cooked. That said, all of this is work in progress and the PCC is requesting comments of players in locations across the galaxy to help adjust these values.