Fitting rooms aren't open now so I won't clothes shop until they are when I can try on as much as I like at home. Why would I make my life harder.
My DH has said he won't be venturing into a shop with masks and went today before they get mandated.
For all the people that 'might' start to venture out with masks there will be lots that think stuff it and stop spending or turn to online shopping. After all, most of us have had three months to get used to online shopping so I think this will have the reverse of the governments spend to help the high street if they do make them mandatory.