Hey Matt,
this is absolutely awesome! You can send the results to txt and open it with xls. Which is much better than xls, because it doesn't have any row limits!
So this is also a workaround to export your PQ results from Excel that contain more than 1,1 Mio rows somewhere else than the internal data model.
I know that many people are looking for this option, so you should spread the word and make this a blogpost!
EVALUATE(SUMMARZIE(YOURTABLE, [Columns...]))