Deck carpet

[SubaSteevo]

I'm planning on changing my rear speakers so I figured I'd fix the carpet that is starting to come up. I was just gonna glue it back down but then I got to thinking (I think too much). Does the carpeting actually serve any purpose besides looks? I was thinking about removing the carpeting altogether and possibly staining the pressboard (or whatever it is) to match the "wood" trim or just painting it. Has anyone done anything similar to this? I think it would look nice to have the back deck match the dashboard.