The conversation screens on SC2 did the job, and were super simple, graphics wise. The characters themselves made the story. The graphics helped.
Think of the original X-Com for that...the graphics are trash by today's standards, but if I reload that game (and I have recently!!) then on the first nighttime mission, I am scared outta my chair! The story makes those graphics irrelevant on X-Com.
SC2 is the same way for me. The ships and aliens are timeless, not because they were rendered in 3-D for a 4k monitor, but because they were full of life and great story. Don't get me wrong, if they want to make them beautiful 3-D rendered for a 4k monitor, go for it. I only care insofar as it meshes with the rest of the games graphics, and that the aliens themselves are full of life!!!
(Need I point out the Syreen? NOT HOT at all by any objective standard. What, a few hundred pixels and 30 or less colors? But oh man, what guy didn't dream of them because of the story, the black screens, and the dialogue? I'd even say the Syreen were at their best *ahem* when we got the black screen and couldn't even see them at all! Writing trumps graphics, if you have to chose (which we probably don't.))
Very pretty alien though! Reminds me of ORZ!
True, but keep in mind - Star Control II graphics were absolute bleeding-edge technology-wise at the time. The planets, the 3d rotating starbase, detailed aliens, the ship combat. So I'd like to be immersed as much as humanly possible, and have a LOT of detail on the ONE screen where you see things up close.
More Stardrive weird, intricate, colorful details - the computer chips and the mechanical tendrils inserted directly into the owl-creatures' brains:
'
Less GalCiv - alien guy standing in front of vague spaceship bridge:

It's in the DETAILS. Multiple working-parts. Creative additions (like the owls doing the robot thingy's bidding). Charming animation. All of this SUPPORTED BY a technology that, these days, lets you do things like the shimmering rainbow pools of Venus in Destiny, and a sky that's constantly showering meteors:

It's truly impressive what CAN be done. And since Stardock doesn't need to model an entire world's 3d landscape (just a fraction in a conversation screen), the details can be expanded and iterated upon and crammed into each screen. It doesn't have to be that expensive. You know what game totally nailed the idea I'm talking about?
It was an Indie with a micro-budget, but they crammed so much detail into every screen and every area - TRINE 2 is the game I think illustrates what I'm trying to say PERFECTLY:

Look at that! It's amazing! It's gorgeous! It's incredibly advanced-looking! And it's a low budget indie game! That's what I mean. Not spend $500,000,000 to make it look like Destiny. Just spend the budget of an indie game to craft that much loving, tech-enhanced detail into each conversation screen. You'll win 10 million admirers.