>here is strictly no reason for each person to own a TV, PC, dishwasher, washing machine, etc. - most of that could be shared so as to reduce electronic waste and increase sustainability.
This sounds nice in theory, but doesn't work out well in practice. You get a tragedy of the commons situation where people don't take care of the equipment and it gets broken, or dies early. Also, some people are just really bad with handling and taking care of things: some people will buy some item, and then you look at it again years later and it's in pristine condition. But look at another person's identical item after that time and it's either destroyed, or looks really beat-up. Maybe they're too rough with it, maybe they never clean it, maybe they don't maintain it, but I've noticed some people just seem to destroy everything they use.
Also, trying to share many things doesn't work out in practice because people want to use them at the same time. You can see this at places like laundromats; you can't expect people to wake up at 2AM to do their laundry. People usually like to watch TV at the same time too. So you need enough equipment to handle peak times.
And sharing a PC? What do you do when someone in your commune insists on clicking on every potentially malicious attachment on your shared Windows PC?