But is it art?

I've got to say I'm no expert when it comes to art. I like Egon schiele, Ramon Casas, Degas, and Lautrec, probably a few more that my cough medicine addled brain cannot reach for this fine morning.
I know art is subjective but I have NEVER understood modern art and cannot fathom how a Pollock is superior to a Francis Bacon. I just don't get it at all. Why cubes on a blank canvas, what is it supposed to represent? What do all those splatters of pain mean? Is that emotion? How are we supposed to know?
I was unimpressed by Tracy Emin's messy 'bed' a few years back, and though mildly tickled by Damien Hirst's glittering bejeweled skull, I find a lot of his stuff goes right over my head too. Finally it dawned on me that maybe I'm just not their target audience and I should just accept that and go on enjoying what I liked.
I had almost stopped wondering about it and would cheerfully have not given it another thought when I read the times culture this morning. My eyes widened when I read...

"Mark Wallinger, 48, from Chigwell in Essex, has been intriguing visitors to the Turner exhibition at Tate Liverpool with Sleeper, in which, dressed in synthetic fur, he wanders aimlessly around a gallery long after closing time, looking out at passers-by and occasionally disappearing from sight."

For this he was awarded £25,000.
I am scratching my head in complete confusion again.

I mean, can someone explain that to me? How is dressing up in a pretty worn bear suit and wandering around art? I genuinely would like even the slightest hint of enlightenment on the subject. What am I not getting? Are you getting it?
Is there a getting it?