I agree with atacrawl... No one would ship a boat if it didn't float. It's acceptable in todays software to ship a very simple version, especially on mobile devices, and Grid looks awesome. I wouldn't want more feature in it for version 1, but I don't see how it reinvents spreadsheets. It is something new entirely, that seems to be a perfect fit for content creation on touch devices, but it looks closer to a powerpoint/keynote concurrent than a spreadsheet one.