I absolutely loved working from my bedroom for years. It was great (despite the common down falls like the ones listed here). My family used to make fun of me at parties and seasonal celebration "OH YOU'RE NOT IN YOUR PAJAMAS TODAY", but joke was on them after a couple of years - I was making 5 to 10 times what they were per year, and I was waking up at 8:50am with no commute.
I eventually ended up investing in building my own "detached" office in the back yard - a dedicated space set up for working. This was by far the best thing I ever did. It created a visible boundary between home and work life, and I still didn't have to commute or work in any clothes other than my pajamas the majority of the time.
I couldn't image going back to a bedroom now. But even more so, I can't imagine how painful it is for people to sit in traffic every day, stressing they might be late, burning money on fuel and their car, and waking up earlier than they really should.
It's pretty reasonable to think you might spend $100 a week on a commute straight out of your own pocket. That money is gone forever. Now consider if you invest that money over 30 years in some low to medium risk areas and average 10 - 15% per year. That's a healthy addition to your retirement fund of around $1,500,000, plus a good amount of extra sleep.
EDIT: Okay 15% is maybe a bit hopeful and lucky. But still 7 - 10% will make a difference in your retirement.