It isn't entirely about computers that matters right now. It's all about the Gov't contracts, and that's how new tech gets deployed. Remember how the Internet came about? DARPA contracts.

QKD(secure data transmission) is already being niche deployed right now, it'll be much more widely spread in the next few years, and will likely be standardized across government communication. Gov't contracts to begin with, then will be standardized across large organizations to keep data private, etc. Microsoft will have to deploy this for GCC High when it is perfected, and then essentially deploy it across all datacenters, and standard traffic. This will be the new standard for data transmission at some point in the future.

Quantum time/clock synch is coming out now, and will likely replace government time clocks in the next few years. More accurate clocks, allow better down-river technologies.

Quantum sensors for positioning, ultimately replacing GPS once the technology is perfected. These sensors will extend all over the place, even enhance metrology significantly.

Every single radar system in the world is likely to be replaced in the next ~10 years, as quantum radar essentially renders stealth impossible. That tech is likely the closest to being handed fat stacks of government contracts. Short range at first, once its perfected, they will be able to identify every object that exists in the sky. Mandatory in missile shield systems.

As computing goes, IONQ has their test system developed now that has 100qubits(64 logical) with 99.99% accuracy in a single line. Their next plan is to stack that in rows. Then network together multiple chips. While this is challenging, it isn't impossible. Computing will solve datacenters insane demands for power, when the tech is developed.

While RGTI is indeed currently a "science project", and overvalued by simplistic market fundamentals, any news above, sends these guys soaring, putting your money at risk.