In the coming months and years, you're going to see more and more companies and their employees opting to work in open collaborative spaces. The open and collaborative environment is the way office spaces will transform. I really don't think you're going to see any more traditional, cubicle type of spaces.
These spaces also bring with them the option of open, 'work anywhere' concept. I know of some big companies that have gone this way: Cisco has done it, parts of IBM have gone this way, we are certainly moving this direction. It's not a dedicated spot for every employee anymore. Just pull up a chair, with the people you need to be working with at that given time, use your computing device and when you're done, you move on to the next task.
It's efficient and cost effective from even the real estate point of view, and it certainly encourages collaboration, where perhaps in traditional set ups, people didn't collaborate all that much. In today's work environment, we all need to work with a lot of other people in different teams. Just look at the projects that you need to do and all of the different people you need to work with.
Calling all the people together in to a meeting in a stale, static environment... well you'll get something, but call them together in a coffee shop type of environment, and then you get a whole different kind of interaction going.
I've seen a lot of entrepreneurial and start up firms using such open collaborative office spaces and a lot of it was done just to be cost effective, but they end being a bit more collaborative with everyone sitting together.
In our own company, the vice president of application delivery, who owns applications delivery, project management and enterprise architecture... his building is built completely around the work anywhere concept. He is the vice president and he doesn't have an office.