Use Your Laptop at the Beach (!?)

I'm buying a laptop soon. One of the big reasons I want one is that I'm itching to do my computer work out in the garden, now that warm weather is here. I'm already wondering how I'm going to see the screen when I'm sitting out in the sun.

So I surfed around and came upon this wacky product on Lifehacker that shades the laptop screen. Some commenters point out that you could make one of these yourself with a cardboard box or a couple of file folders. This one does fold up neatly and attach to the lid of the computer, and that's kind of nice. Don't think it's designed to keep out sand though...