Level of detail - and choosing texture size for images.

4k textures  of course is only for things close to the camera.

So level of detail or LOD is an important consideration and really the first stage when taking on any modeling job or designing models.

First thing you ask is will this be in foreground middle ground or back ground

Foreground of course is 4k,  middle and back 2k or even just hd would be enough.

Inspiration

Opening shot of asteroids, (can now be done with geometry nodes and a system with 128gigs of ram. :) )

Real asteroids from Nasa

https://www.youtube.com/watch?v=aqB6bPexrlE

Beginner

Derek makes awesome product tutorials.  If you want to make a product animation and need to model some products, he has the best Tutorials.

This tutorial shows you how to model, texture and animate these cosmetics. 

How to do claymation in BLender

SouthernShotty on youtube has really embraced the claymation look.

 This is another awesome style Claymation by SouthernShotty

This is always a good feature in your sci fi animations, a HUD.

Beginner

He creates a nice looking motion graphic using simple shapes.

He makes some shapes, and animates them.  Nice design for the HUD.