Nvidia CEO Jensen Huang on Thursday walked back comments he made in January, when he cast doubt on whether useful quantum computers would hit the market in the next 15 years.

Jensen Huang hosted a “Quantum Day” during GTC, Nvidia’s annual developers conference, where experts shed light on quantum-computing progression. The Nvidia CEO said quantum computers will solve problems more important than just faster food deliveries and more powerful spreadsheets.

Jensen Huang didn't expect his doubts about the immediate commercial viability of quantum computers to affect Wall Street-listed companies so drastically. As part of Nvidia's recent