I think this:
a) looks like a reasonable simulation of Tufte's print style
b) is missing the point Tufte tries to make
Tufte isn't saying you have to make your presentation look like his, his basic thesis is "don't add unnecessary things that take away from the clarity of your presentation" and he's made a name by critically analyzing other people's presentation and work to show where they've gone overboard and why that detracts from the message they're trying to show.
I've sat in his class, read his books and website and followed him for years. His approach and critical analysis of web sites is actually fairly different from print. He understands that the web is a different medium and should be approached differently. His critiques of ESPN and various weather websites are fascinating not because he complains they aren't using enough whitespace or don't follow his print style, but because he actually likes how they clearly and concisely present summaries of dense, compact information.
I'm afraid this comes off a little like cargo-culting Tufte, going through the ceremony without actually grokking his meaning.