I question the practicality of bubbles as well. If one person in your bubble goes to work for example then they expose all of your bubble to whoever they come into close contact with while they are working. The only way to maintain a bubble would be if no member of the bubble ever has any outside contact with other people.I have been seeing family members, just avoiding contact (no hugging, etc. and trying to maintain distance). Bubbles are kind of unworkable. Each person is going to have their own bubble, like my sister and her inlaws. Maybe that is good enough.
I think the same applies to 'regional' opening as we now have in Ontario. It is impossible to not have people from Toronto not travel into areas where things are more open. Hairdressers are getting calls for appointments, restaurants are getting people driving out of the city to go for a meal, etc.