Is Quantum Computing about to actually become useable - even useful?

Microsoft's recent public unveiling of its Azure Quantum ecosystem is expected to turbo-charge the development of quantum applications. This follows similar announcements from the likes of IBM and Google about the state of the art of their quantum projects. 

Is this the moment where Quantum moves from the lab to the real world?

Like other new technologies Quantum has had a few false starts and has been about as subject to the tech 'hype cycle' as AI.  

Now one of the big players has opened its platform tools publicly, it'll be fascinating to see what developers make of the new powerful tools at their disposal.

One big use case seems to be in energy efficiency, climate modelling and chemical development. Quantum computing - enabling as it does fast simulations using significant data processing throughput - appears to be perfect for the processes that underpin these systems. 

What of the risks? Quantum computing poses huge potential risks to digital security, since it could easily break the encryption on which digital infrastructure - and whole economies - rely. Will this prevent the technology's value from ever being fully realised? Or will the tech arms race mean we rush head-long into applying quantum into critical infrastructure without thinking?