The provided text offers an extensive overview of the state of quantum computing in 2025, highlighting its transition from theoretical exploration to nascent practical applications. It distinguishes between quantum supremacy and practical quantum advantage, asserting that while broad, fault-tolerant quantum computers are still on the horizon, noisy intermediate-scale quantum (NISQ) devices are already demonstrating value in specific, narrowly defined areas. The document focuses on three key application domains: quantum simulation, which is deemed the most mature for near-term value in fields like drug discovery and materials science; quantum optimization, showing emerging "runtime advantages" for problems in finance and logistics; and quantum machine learning (QML), which remains the most speculative due to challenges like data loading and hardware noise. Crucially, the sources emphasize the central role of quantum error correction (QEC) and the ongoing evolution of hardware, shifting focus from raw qubit counts to system quality and the necessity of a hybrid quantum-classical computing model for future progress. Research done with the help of artificial intelligence, and presented by two AI-generated hosts.