Apple's big AI play is looking less promising

• Early reviews of iOS 18 beta suggest Apple Intelligence may not make a big splash in 2024.
• Apple showcased a revamped Siri, an image generator, and new text tools at WWDC 2024.
• It will have to deliver on the AI front if it wants to stay on top, analysts said.

A souped-up Siri and email summaries might not be enough to put Apple ahead in the AI arms race.