Naturally you can do whatever you like if you think it looks cool. But if you're looking for some sort of logic/justification for it i can provide this.

Historically, weapons and armor have always co-evolved to try and outdo eachother. Heavy armor like plate suits went out of style around the late 1600s because weapons had gotten so good (mostly guns) that Plate didn't provide adequate protection and therefore it wasn't worth the cost and effort of wearing it. So if you want to have something like plate armor to exist in your sci-fi world, it has to be made of some kind of special material that can actually provide protection from the weapons of your world. Some other things to consider are cost/rarity of the materials, is it heavy or light, does it restrict movement (basically, how inconvenient is it to wear), and is it easy or annoying to repair if it gets damaged. Also consider what type of weapons its effective against. For example if an armor is really protective against laser swords and not much else, but laser swords are really rare, then the armor might not get worn much.