For merchandise...they could go the way of gamestop, and the only merchandise "on the floor" is the display cases. You take your desired display case (or just know what it is - probably even more likely) to a salesperson and they get the product for you (while sanitizing and putting back the display) and bring the product(s) to the register (never giving it to you until you have purchased it and it goes in your disposable bag). At the register, the cashier probably gives you a squirt of sanitizer with your bag and sends you on your way.
A much slower process, but if store audiences are limited, not an overwhelming one...heck, you might look at displays in a store window or varied glass cases and tell the storeperson what you want from the window/case (which can be quickly cleaned)...an even easier clean and execute plan...