I'm not sure we're celebrating it. It's something to be noted. Some applications might find it useful, for running data analysis on the blockchain, but I don't foresee a majority of ETH validators running on this service. Best to avoid Amazon in general given their propensity for censorship.
amazon getting into crypto adds a ton of credibility from an outsider's perspective. even if you're not a fan of amazon, this should have a positive impact on crypto as a whole.