I have a keyboard protector for much less interesting purposes: it's a degree of mitigation from accidental harm, given I often eat and drink while using the laptop. You can get them in custom patterns, too: flags, sports logos, etc. Mine is tie-dye, to reflect my inner hippie

A side benefit is it mutes the clack of the keyboard, so if you're up late working in bed, there are fewer disgruntled sounds from the other pillow ...