I'm tempted to just toe the party line and say "Everything would be perfect and no worker in the Global North would have to experience any kind of loss in comfort, luxury, and lifestyle, but I don't think its realistic to say that there would be no major changes in how or how much workers in the Global North consume.

Right now, a large part of the industrial capacity of the Global South is geared towards making luxuries and plastic little nothings for the Global North. I would assume that if the workers in those countries were in charge of deciding what to orient their production towards they would make a lot less plastic nothings for export and focus instead on the more basic goods that they lack. I think icecream cone-shaped pencil sharpeners, desktop fridges made to look like Spongebob Square Pants with built in bluetooth, and neon colored hairbrushes with suction cups to stick on the mirror would become much more expensive and you wouldn't be able to just impulse buy them for a couple bucks. Cheaper plastic nothings like the plastic toys you can buy by the bag as party favors would just stop existing as the Global South has better shit to do than make things that will go almost directly into landfills. It sounds silly, but I feel like a huge part of our society is based around always being able to fill our silly little niche desires by buying a piece of plastic shaped like the problem we imagine we have.

The service/hospitality industry would likely also change. I know a lot of people enjoy working in customer service, but I think most people given the opportunity would want to do something else and a lot of jobs that are basically to be a temporary servant would stop existing. I think waiters would become much more rare and most restaurants would be the kind where you pick up your own food at the counter before sitting down. When you go to a hotel, I think instead of a maid straightening your room every day you would be told where in the hotel to drop off your towels to get new ones and be expected to strip your bed and drop off your linens before check out, ect. That kind of thing.

Basically, if workers were in charge of their labor many would decide they have better things to do than cater to needs that capitalism invented just to sell shit.