As for all those conference rooms...

If my job was such that I used a laptop exclusively and went pretty much paperless then I can see how migrating to a conference room would be easy enough. However I believe most gritty technical jobs are not laptop centric and generally they are accompanied by pre meditated workspace configurations. To regularly give up that optimized workspace for privacy or migrate that workspace to a conference room on an as needed basis to me is not an efficient use of time and highly impractical.

The gentleman who has dual monitors is a perfect example. If a person with this setup needs some heads down uninterrupted crunch time the office structure does not support this. The employee stays put because of the optimized workspace and is constantly distracted. The alternative is the employee moves to a conference room and either dismantles and reassembles a workstation in the conference room or they choose to take a laptop and sacrifice the efficiency gains the desktop environment gives them. I know I can't see 100 lines of code on my laptops screen no matter what I set the resolution to.

If I am a PM and constantly in meetings anyway this setup works for my job type because I am essentially a mobile worker anyway. The office is moot except for the desire to have face to face interaction.