To me, this sort of art doesn't introduce us to anything new. It's just somebody on an ego trip whose work has to be brought to public prominence to have any validity. I'm mindful of artists from the past such as Van Gogh and Lautrec who painted for the love of painting and whose works weren't appreciated until years after their deaths. There's also Henry Moore whose sculptures left me bemused but at least introduced a different form. Finally, there's Jackson Pollack whose work I thought to be hugely over rated but at least it was something that didn't need public prominence to validate.
I'm not an art historian (obviously), just trying to express my views on what I think makes good art. If an artist is relying on his piece generating an audience reaction, then I regard it as bad art. Let's face it, Adolf Hitler generated an audience reaction but I don't think many people would regard Auschwitz as a piece of art. If the artist is trying to create an expression of form which will give him personal satisfaction irrespective of the audience reaction, then I'd be much more likely to regard his efforts as good art.
A desk and chair is a desk and chair, whatever scale it is. To my mind it's not scale that makes the piece art, it's expression of form. I realise other people will disagree with me and I respect their right to disagree with me (even if I believe they must be off their rockers) because that's how mankind evolves into a more adaptive creature.
Incidentally, I think the Angel of the North is a magnificent creation, as is the Birmingham Bull Ring and the Debenhams store. I also think the joker who covered the Reichstag a few years ago with aluminium foil must have been having a laugh when he described it as 'art'.
Gill