At our small company many of us became more productive with working from home, to the point that they closed the office. A couple of people are finding it difficult because of their home situations, so it would be good still to have a space to work outside the home. But generally we're getting more done these days, and most who do work that needs prolonged concentration find this more conducive to that.

It varies between different companies, teams, roles and temperaments. What Dell is doing sounds like corporate heavy-handedness.