At the moment, weapons, armour, and ammo display their complete stats in the inventory. Most other gear, however, does not. In particular -- these are just the ones that I've noticed recently --

- drive upgrades
- cargo hold upgrades
- biosoft ROMs, even once identified
- barrels of armour-upgrading goop, ditto

This information can of course be looked up in the wiki, and most of these can be installed to find out their stats, but it's annoying not to have them displayed in inventory, and inconsistent to have them displayed for some things but not others.