The enthusiastic reception for Google's Workspace CLI reveals a counter-intuitive trend: old-school Command-Line Interfaces are becoming the preferred way for AI agents to interact with software. Unlike humans, agents don't need GUIs and benefit from the CLI's deterministic, low-friction nature, avoiding the 'abstraction tax' of newer API layers.

The next generation of software may lack traditional user interfaces. Instead, they will be 'API-first' or 'agent-first,' integrating directly into existing workflows like Slack or email. Software will increasingly 'visit the user' rather than requiring the user to visit a dashboard.

As AI makes it trivial to scrape data and bypass native UIs, companies will retaliate by shutting down open APIs and creating walled gardens to protect their business models. This mirrors the early web's shift away from open standards like RSS once monetization was threatened.

The next billion AI agent users will not interact via developer-centric interfaces like Telegram. The winning platforms will be opinionated, provide guardrails, and hide technical complexities like tool calls, offering a user experience closer to a polished SaaS product.

AI agents are becoming the dominant source of internet traffic, shifting the paradigm from human-centric UI to agent-friendly APIs. Developers optimizing for human users may be designing for a shrinking minority, as automated systems increasingly consume web services.

As users increasingly rely on AI agents, traditional graphical user interfaces will become obsolete. SaaS products must evolve to offer conversational interfaces that other agents can interact with directly. The primary user will shift from a human clicking buttons to another AI sending messages.

The traditional per-seat SaaS model is becoming a "tax on productivity" in an agent-driven world. As companies buy agents to do work instead of software for humans, the model shifts. Sam Altman's comment that every company is now an API company reflects this move from user-based pricing to value-based, programmatic access.

As companies integrate AI agents into their workflows, unrestricted API access to their own data is non-negotiable. SaaS providers that paywall or limit API access will be abandoned for more open platforms that don't hold customer data "ransom."

Users will stop interacting with countless individual apps and websites. Instead, they'll communicate with a personal AI agent that handles tasks by interfacing with services via APIs, making traditional graphical user interfaces obsolete.