...But Who Actually Wants a Touchscreen Laptop?

This is a question I've been thinking about since I've seen early Windows 8 products: What on earth is the point of having 2 forms of input on the same device to do the same thing? I'm almost certainly not using the touchscreen on a touchscreen laptop (let's just call it a TSL) since the keyboard is pretty much always right there. It's not as light or compact as a tablet. If you ask me, just skip the poor excuse of cheap R&D investment. Am I wrong on this one?