Considering there hasn't been a major console (including xbox) that's been immune from crackers running arbitrary code, I'm pretty confident that we'll be seeing linux running on the surface at some point. Unfortunately the article's title is probably accurate; It's probably going to be too difficult for someone who's not a very-motivated linux fan to do it.
It's a shame too, when I first saw the surface my initial reaction was "Holy crap, if I can wipe it and put Arch on it it's the perfect mobile laptop replacement, I'll buy it for sure". Oh well, guess I'll have to wait to see how easy the jailbreak is.