Can't switch reading from pleasure to research — tool to enable intentional reading

Many knowledge workers struggle to switch reading modes from casual pleasure to deliberate research: they can read long-form text but fail to capture actionable insights, track citations, or translate passages into reusable notes without breaking their flow. This problem affects an estimated 500 million knowledge workers—consultants, product managers, graduate students and researchers—whose productivity is constrained by attention scarcity and fragmented reading-to-note workflows. You could build a reading platform with explicit "pleasure" and "research" modes that uses LLM-enabled summarization to extract concise claims, linked citations and structured note snippets as users read, plus bidirectional sync with personal knowledge management tools. Core features would include one-click claim capture tied to source passages, templateable literature-review exports, and library-level search that surfaces insights across saved reads. Commercially, a subscription model around $120/year aligns with market expectations; the raw market size implied is roughly $60.0B (500M workers × $120/yr), and the opportunity has a Market Score of 90/100 with Revenue Potential of 76/100. This moment is favorable because recent advances in LLM summarization, the mainstreaming of PKM workflows, and rising demand for micro-learning all shorten time-to-insight and make a product like this practicable. Competition is medium: to stand out you’ll need rigorous source attribution to mitigate hallucination risk, tight integrations with existing PKM and enterprise stacks, and clear, measurable ROI (time saved) for users; those are the primary technical and go-to-market challenges despite the sizable and timely market opportunity.