The article is using art in the sense of craft, i.e. the craft of refurbishing old PCs. If you read the article there's no comparison to high art or collecting,

The article is using art in the sense of craft, i.e. the craft of refurbishing old PCs. If you read the article there's no comparison to high art or collecting, in fact they mention doing this in the context of donating computers that still have life left to people and organizations that can't afford new ones.