That does look compelling in a way. Though the broad "$500 - $800" price tag makes all the difference. At $800, I'll definitely take the XOOM (though that keyboard is compelling on the Slider).
It's odd, I definitely read about this during CES, but never really considered it because I was so fixed on the XOOM. Now that the XOOM seems to have a $800 price tag, I suspect others may do what I am doing - namely going back to see what other options exist for comparison sake..