** Quantum computing company IonQ's IONQ.N shares rise 5.1% to $31.70 premarket
** Company's 2024 results will be at high end of bookings and revenue forecasts - CEO Peter Chapman
** Quantum computing stocks, including IONQ, fell on Wednesday after Nvidia CEO Jensen Huang said the technology's practical use was two decades away
** Chapman says upcoming launches in 2025 will enable IonQ to deliver near-term business value
** Company's shares more than doubled in 2024
(Reporting by Rishi Kant in Bengaluru)
((Rishi.Kant@thomsonreuters.com))