I find it hard to believe that someone who writes something this wrong can function in society.
Microsoft invented the tablet computer a decade before the iPad existed.
Their marketing may have sucked, but they were well ahead of the rest of the industry (and apparently the world).
Please, stay civil. :)
Anyway, I don't think the statement is wrong. Sure, Microsoft had tablet computers first, but I think it's also true that the Surface RT and Surface Pro were made in response to the iPad's success.
Are you referring to PixelSense?
The antecedents to the Metro design were in Zune HD and the Zune desktop client, among other things.