How many years of data do they have to look at?
I know from personal experience my understanding of Geometry and Trigonometry improved exponentially when I started working as a draftsman and used AutoCAD. I don't think anyone is advocating getting rid of tangible items in learning, but we are just at the beginning stages of figuring out how computers can be used in educating children. I think it's a shame if the potential were derailed by a bunch of naysayers that didn't even want to explore it because "That's not how they did things back in the good old days."