I’d imagine it is sooner that 10 years, but It’s not going to be in consumer hands anytime soon with its massive decryption powers.
totally agree. consumer quantum computers are many decades off.
Massive decryption powers but also the ability to perform quantum cryptographic tasks which will make it impossible to eavesdrop on encrypted communication without leaving a trace.
The first application will be cracking encryption — which quantum computers promise to do in near real-time. Expect the government to classify them, then all the real work making a viable civilian product will come from... elsewhere.