Players will be able to pick up new plugs and decor for houses, new costume items and dyes for their personal equipment, a new hoverboard, and new mount customizations, all of which should make your character look completely Strain-infested. If that's what you want, at least. No word on what functions the new plugs will perform, but we're betting it'll be gross. Take a look at the official drop page for a few more pictures of these customizations in action.
[Source: Carbine Studios press release]
WildStar Strain customizations