Startups are overwhelmingly focusing on rings for new AI wearables. This form factor is seen as ideal for discrete, dedicated use cases like health tracking and quick AI voice interactions, separating them from the general-purpose smartphone and suggesting a new, specialized device category is forming.

Many voice AI products fail by tackling too broad a problem. April's success came from focusing intensely on a limited set of high-value use cases (email, calendar), which allowed them to build a product that "just works" and feels human-like, driving retention.

Demis Hassabis suggests that previous attempts at smart glasses like Google Glass were too early because they lacked a compelling use case. He believes a hands-free, always-on AI assistant like Project Astra provides the 'killer app' that will finally make smart glasses a mainstream consumer device.

Using a non-intrusive hardware device like the Limitless pendant for live transcription allows for frictionless capture of ideas during informal conversations (e.g., at a coffee shop), which is superior to fumbling with a phone or desktop app that can disrupt the creative flow.

Contrary to the belief that new form factors like phones replace laptops, the reality is more nuanced. New devices cause specific tasks to move to the most appropriate platform. Laptops didn't die; they became better at complex tasks, while simpler jobs moved to phones. The same will happen with wearables and AI.

Startups like NextVisit AI, a note-taker for psychiatry, win by focusing on a narrow vertical and achieving near-perfect accuracy. Unlike general-purpose AI where errors are tolerated, high-stakes fields demand flawless execution. This laser focus on one small, profound idea allows them to build an indispensable product before expanding.

Instead of visually-obstructive headsets or glasses, the most practical and widely adopted form of AR will be audio-based. The evolution of Apple's AirPods, integrated seamlessly with an iPhone's camera and AI, will provide contextual information without the social and physical friction of wearing a device on your face.

The most compelling user experience in Meta's new glasses isn't a visual overlay but audio augmentation. A feature that isolates and live-transcribes one person's speech in a loud room creates a "super hearing" effect. This, along with live translation, is a unique value proposition that a smartphone cannot offer.

Don't start with a broad market. Instead, find a niche group with a strong identity (e.g., collectors, churchgoers) that has a recurring, high-stakes problem needing an urgent solution. AI is particularly effective at solving these 'nerve' problems.