You may be surprised to learn that Apple was granted, essentially, a patent on touchscreen computing. (and yes, I know it’s N-finger, so technically it’s multi-touch.. regardless) There is TONS of prior art to invalidate this, and I have in my museum-of-geeky-products-i-bought-that-never-caught-on, several pre-2007 devices that can prove that.
Really. Shush.