Quantum Computing Next Big Thing Apparently

Boris Johnson has announced that the UK is going to 'go big' on quantum computing which apparently is the next big leap forward in computing so as with anything with computers, i contacted a Tech expert and asked him 'So Quantum Computing...WTF'?
As usual there was a lot of sighing from him and lots of me saying things like 'What???' but i think i got the jist of it, or more than likely i never, but here's how i took it.
So normal computing uses a string of binary, represented as a 0 or a 1, that are transmitted to the processor which encodes them in sequential order but a quantum computer encodes the combinations of 1s and 0s at the same time therefore performing the tasks much quicker.
The previous most powerful quantum computer achieved 66 simultaneous combinations but IBM have recently achieved a new record with 127 combinations encoded simultaneously with the goal of reaching 1,000 by 2023.
German carmaker Daimler have used a quantum computer to model new lithium batteries and my guy agrees that as computers pretty much do everything now, being able to do it 1,000 times faster will have massive implications for us which is nice but i will just be happy if i can get one that doesn't hang
if you try to run Microsoft Word and an Excel Spreadsheet at the same time.