I could get a lot more done in an 8-9 hour day with a PC and a desk phone than I get done now in a 9-10 hour day with a laptop /tablet / smartphone, which should allow me to be more a lot more productive but just interrupt me. I don't want the mobile flexibility to work anywhere. It sucked in management roles doing a full day then having dinner with friends and family then getting back to unfinished calls and mails. I much prefer to work later then switch off totally at home.

Even one day a week out of the office might allow each employee to see their work in a new light.