I work in a huge multi-national corporation. Some of the people I interact with are co-located with me, however, most are not. I've even worked with people who are 100% remote. What does it matter to them where I'm sitting? Now, I agree there is something to be said about team building & sheer convenience, depending on the nature of your work, but as long as you are getting the job done, who cares if you are sitting behind your desk 40 hrs/wk?

This should also be a no-brainer for employers. Flex schedules/working from home is an excellent perk, and is low hanging fruit in terms of a company "going green", since there are less people driving to work and offices supporting fewer people produce a smaller carbon footprint.