MacBook – Multiple Monitors using separate “spaces”, yet have screensaver stretch as if one space macbook pro

Not with the default Apple Spaces.

There is an alternative, though. CocoaBots makes a small app called Hyperspaces which builds upon the default Spaces and adds a bunch of cool features. Multi-monitor support is coming to their next release.

http://thecocoabots.com/blog/post/148/hyperspaces-104-and-the-road-to-11/

Apple maintains a knowledge base article listing which Mac models support either one or two external thunderbolt displays.

• http://support.apple.com/kb/HT4885

The technology does allow for multiple monitors to be daisy chained. In fact, the devices you daisy chain doesn't matter, nor does the order they are in. However, like with the Display Port and eSATA, the problem at the moment is finding actual devices that support this feature. Until Apple or another manufacturer provides monitors with the ports needed for daisy chaining, this will not be possible.

The advantage here is unlike eSATA and Display Port, the bandwidth available will make this more then manageable from the port itself. The biggest obstacle will be the ability to provide enough power to run all these daisy chained devices. Therefore just getting a cable will not be sufficient. Each device will be required to have its own incoming and outgoing port.

Give the technology another year or so it will be more then doable and more mainstream. Apple would most likely also add these ports to their monitors fairly soon, I suspect during the next iMac/Monitor refresh schedule.