That is exactly what you do... you plug the laptop into the projector and show the world you work space in all it's glory on a 6 foot screen
I have not used the Sanyo model myself... but the specs sound good to me, actually a little better than the Toshiba model that I bought from there and that projector is great, no complaints whatsoever. I did not notice if the sanyo had a zoom or not, you might want to look into that if it is important to you. You can always move the projector back or forward to fill up the screen otherwise, some also have an in menu function for zooming as well.
When hooking up the laptop to the projector I have found the best system to be:
1. Hook up all the cables with everything off.
2. Turn on the projector and let it come up.
3. Turn on the laptop next.
It will all sync up properly most of the time when done this way. Sometimes you will have to hit a function key to shoot the video out the back of the laptop (on Dell's it is usually holding down the function key and pressing the f8 key at the same time. With this button you should be able to toggle between having the image on the laptop and screen, laptop only, or screen only.
I would just play around and find what works best for you computer/projector combos, most of the time you can switch laptops in and out on the projector while they are both running and just have to his the Function f8 to sync them up.
Have fun!
Kevin.