Apple has introduced a significant update to Siri in iOS 18, featuring a colorful interface and enhanced AI capabilities. The new design includes a rainbow glow around the screen edges when Siri is activated, signifying deeper integration of Apple Intelligence. Compatible devices include iPhone 15 series and M-series Macs. Activation is now automatic with the latest updates, although users may need to adjust settings for language and compatibility. Despite the upgrades, some experts suggest Siri's features still lag behind expectations, hinting at Apple's marketing shortcomings.