Unlike the dot-com bubble's speculative fiber build-out which resulted in unused "dark fiber," today's AI infrastructure boom sees immediate utilization of every GPU. This signals that the massive investment is driven by tangible, present demand for AI computation, not future speculation.

The vast network of consumer devices represents a massive, underutilized compute resource. Companies like Apple and Tesla can leverage these devices for AI workloads when they're idle, creating a virtual cloud where users have already paid for the hardware (CapEx).

The computational power for modern AI wasn't developed for AI research. Massive consumer demand for high-end gaming GPUs created the powerful, parallel processing hardware that researchers later realized was perfect for training neural networks, effectively subsidizing the AI boom.

Microsoft CEO Satya Nadella sees a major comeback for powerful desktop PCs, or "workstations." The increasing need to run local, specialized AI models (like Microsoft's Phi Silica) on-device using NPUs and GPUs is reviving this hardware category. This points to a future of hybrid AI where tasks are split between local and cloud processing.

The focus in AI has evolved from rapid software capability gains to the physical constraints of its adoption. The demand for compute power is expected to significantly outstrip supply, making infrastructure—not algorithms—the defining bottleneck for future growth.

The intense power demands of AI inference will push data centers to adopt the "heterogeneous compute" model from mobile phones. Instead of a single GPU architecture, data centers will use disaggregated, specialized chips for different tasks to maximize power efficiency, creating a post-GPU era.

Contrary to the idea that infrastructure problems get commoditized, AI inference is growing more complex. This is driven by three factors: (1) increasing model scale (multi-trillion parameters), (2) greater diversity in model architectures and hardware, and (3) the shift to agentic systems that require managing long-lived, unpredictable state.

The next major hardware cycle will be driven by user demand for local AI models that run on personal machines, ensuring privacy and control away from corporate or government surveillance. This shift from a purely cloud-centric paradigm will spark massive demand for more powerful personal computers and laptops.

AI's computational needs are not just from initial training. They compound exponentially due to post-training (reinforcement learning) and inference (multi-step reasoning), creating a much larger demand profile than previously understood and driving a billion-X increase in compute.