Here's the thing, though.

Tablets won't replace the desktop/laptop. Augment, sure, but they aren't going to kill them off, especially in the workplace. They're different devices with different functions--it's like saying that the microwave will kill off the oven.

Google Docs is great for consumption, sure, but for creation it's so-so (especially compared with better, dedicated tools), and there's no guarantee it won't be sunsetted when it ceases to help funnel meat into Google's advertising maw.