iOS 27 is the most important announcement Apple (AAPL) announced at its "Surprise and Shine" event, says David Nicholson of Futurum. He makes the case that the update will amplify Siri capabilities in ways investors are underpricing right now. David also weighs on whether using Alphabet's (GOOGL) technology is a plus for its AI strategy or serves as a hinderance to future developments. As for the iPhone Duo, David expects it to sell well but doesn't see it as a massive mover for the Mag 7 stock.