My dad told me a story about a guy who wanted to close the patent office in like, 1902 or something because he said that everything that could be invented had been.
Now, this story is impossible to verify as being true, since I'm not sure where my dad got it from, but my piont is this: that things are still out there to be though of, as long as we've got weirdos with imaginations. And you'de be hard-pressed to find a place with more imaginative weirdos than the Downs.