The Apple Watch Ultra 3 needs a smarter Siri more than the iPhone - and the Pixel Watch 5 shows why

The Apple Watch Ultra 3, released this September alongside iOS 27 and the iPhone 18 lineup, is the most capable wearable Apple has ever shipped - and also the most frustrating, because it exposes a problem that's been building for years: Siri on the wrist is dramatically underpowered compared to what a 2026 smartwatch can actually do, and the contrast with the Pixel Watch 5, which I've been wearing since its August 12 launch, is now impossible to ignore. Here's why the Apple Watch needs a smarter Siri more than the iPhone does, and what Google got right. The Apple Watch Ultra 3 is a remarkable piece of hardware: the new titanium chassis is lighter, the dual-frequency GPS is the most accurate I've tested in any wearable, and the brighter display finally matches the Pixel Watch 5's outdoor visibility. But the moment you try to use it as an AI assistant rather than a fitness tracker, the experience falls apart. Ask Siri on the Ultra 3 to do anything multi-step - find a restaurant near your next meeting, check the menu, and text your friend the address - and it either fails outright or hands you off to the iPhone, which defeats the entire purpose of a $799 standalone wearable. The Pixel Watch 5, powered by Gemini Nano running on its own dedicated chip, handles these multi-step agentic requests natively on the wrist. I can ask my Pixel Watch 5 to summarize my last ten emails, draft a reply, and send it - all without my Pixel 11 Pro XL even being in the same room. The Gemini 3.7 Flash integration, which arrived with the August Pixel Drop, made this gap even more pronounced: the Pixel Watch now understands contextual follow-up questions, remembers the topic of a conversation across multiple queries, and can orchestrate actions across apps in a way Siri on watchOS simply cannot. The deeper issue is that Apple has chosen to keep most Siri processing on the iPhone for privacy reasons, while Google has invested heavily in on-device Gemini Nano inference that runs locally on the Tensor G6 and the Pixel Watch 5's chip. The result is that the Apple Watch Ultra 3 - despite being the better fitness tracker and the more durable hardware - feels like a remote control for an iPhone, while the Pixel Watch 5 feels like a genuine standalone computer on your wrist. For Apple, fixing Siri isn't a nice-to-have in 2026; it's existential for the Watch category. Until then, the Pixel Watch 5 remains the smartwatch to beat for anyone who wants AI on their wrist.