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.

Nvidia (NVDA) chief executive Jensen Huang apologized for tanking quantum computing stocks earlier this year when he said the technology’s usefulness is still decades away — but one analyst says he’s actually right.

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.