The artistic happenings on Google's home page (here marking the anniversary of the great Dizzie Gillespie) have become the digital equivalent of the old New Yorker magazine covers – topical, surprising, marveled at.
How can something so utilitarian (a search engine) be so pleasing to the eye? Pre-historic people carved decorations on their weapons and painted scenes of daily life on earthen pots. Whatever is valued for productive use is a fair canvas for human expression.
Best of all – as noted here before – Google boogies with its logo, not entombs it in rules.