Number 2 is highly circumstantial but it does ultimately come down to the individual to make friends. My concern is just that it becomes harder when everyone else is also locked up at home working or consuming entertainment all day. Many people are only a commute and an office away from that being their life.
I definitely prefer working from home for myself mind you, but I can see the negatives and totally understand why many peoppe would rather an office. I currently split time between office and home and they both have very diverse pros and cons.
Most of my original comment was just speculating a possible future scenario. I just see the possibility for people to fall through the cracks of society and just work and consume entertainment all day at home, and if that becomes the everyman then society will change to accommodate that.
It's just those cracks are not easily visoble. Perhaps even putting more of our lives online will make the cracks more visible - our shared pessimism may be wrong :-)
2. you start to bump into same people - in fact you will likely have more in common than average office neighbour because you live in same school district, have chosen to telecommute etc
3. mostly telecommute does not happen because it's less convenient to manage not to do