I make no claims for being a clever scientific person, but I have read so many times in my life time, scientific statements that say we will never be able to do something. Now 30-50 years later we are all doing those things. Think back to the possibility of a computer in any form being used within the home, when was that first even considered a possibility, not something that cannot be done?
It was only during the 2nd World War that it was deemed possible by scientists for a computer to be housed in a very big property, a computer which as we know now was far less powerful than compare to a mobile phone today. Those same technical wizards were far from thinking we could all have one on our table tops in the 1980's, or one on our wrists in the 1990’s! (I still own an old Seiko computer watch from 1984)
So, while quantum processors cannot do PC/Turing functions as we speak, we cannot rule it out, we cannot say it cannot happen.
If I was able to live long enough to collect the winnings, I would eagerly wager a few thousand pounds today at say 1,000,000 to 1 that quantum processors will be able to 'play Crysis' (or simulate a powerful PC computer and graphics card environment) within the next 40 years. We are only at the very beginning still in terms of understanding and using quantum processing, let’s look forward to the near future when it becomes normal for everyone to have access to, and use, Quantum processing in everyday life (Some of us playing old PC games on handheld quantum devices!).