I feel like this might be easier to dust. Right now if I want to clean my PC I have to open it and hit it with compressed air. This one you can just blow clean whenever.
It's still being exposed to orders of magnitude more dust, which provides more opportunity to destroy components. Increasing the frequency of cleaning also brings with it its own risk of destroying components.
As long as your dust isn’t conductive (such as metal dust from a machining shop) it really isn’t a real concern. Most of the time if dust kills something: its caked on, thermally choking components, and often mixed with something else like tar from cigarettes.
Exposed and on display like this, the owner is probably going to be meticulous about air dusting it often.