Fridges are the new rocket science… IBM’s target of a million-qubit requires the biggest and coolest fridge ever.
The article is also a good overview of where quantum computers are, and where they will be. Quantum computers will be exponentially better at some tasks, but not at all tasks. Excel will still run on your desktop; high-dimensional problems (investments! back-tests! optimizations!) would fit well in quantum computers. The next generation of software will separate tasks and send them to either/or, thanks to cloud-based quantum capacity.