I've yet to see any good arguments against it being art in my entire life.
You can't be binary about it. That's like saying a film is automatically a work of art or it isn't.
I'd strongly argue that it's actually impossible to say is "games are art" or "games aren't" art. I'd argue this about all other mediums too.
The correct position is that games
can be art. The actuality today and across the sum total of videogame's short history are that the majority of games
aren't art but simply games (and there's nothing wrong with that).
Most games are pretty much exactly equivalent to playing a game of chess or checkers or solitaire. An exercise of skill (and by the way most games are no more interactive than real world physical interaction moving chess pieces, not in principle anyway, so I wish people would also stop mentioning interactivity as though it automatically confers something. We interact
all the time in reality and that's neither art nor gameplay that's just being alive).
I would no more describe the majority of games as art as I'd look at a chess set sitting on a tabletop and say "hey that's a piece of art". There may be artistry (not to be confused with art) in the production of both, the chess pieces may be beautifully designed and crafted, just as the game design may be beautifully designed and crafted: but the end result is simply a game. Artistry is all too often confused with automatically being art.
That's not to say you can't take all the ingredients that constitute a videogame and create art, of course you can, heck you can raid the contents of rubbish bins and create art from the contents so you can surely create art from textures, music, sprites, polygons and all the other options for a videogame. But most games don't do this as they are either designed and created first and foremost as games or at best commercial entertainment; again making a game does not automatically mean you're created art at the same time. However the potential is there and certainly there is now a decent group of games that I'd be happy to make solid claims as art inasmuch as the sum of their parts delivers more than a mere game but a thematic and evocative experience consistent with most notions of what art actually is (which is quite tricky to pin down itself). Journey, Ico, and SOTC are obvious examples (one's called out interestingly enough at a exhibition I attended recently in Edinburgh on videogames - link below for reference).
I do think there's a misguided push to see videogames as art full stop, which as I've noted doesn't make sense no medium is automatically art no matter general perception otherwise and that includes painting, sculpture, poetry, literature,etc. It's just that some mediums have, over time, built up a much higher percentage of artistic works vs non-artistic works and have been culturally associated as such. For videogames if that's going to happen it's surely a way off yet as the prevalent focus for the majority of games simply isn't about creating art (and to be honest I'm not sure I look to videogames to primarily art, I look to them to be primarily games and fun to play although I do enjoy the sub-set pushing over the line into art).
Link to exhibition I mentioned:
http://www.nms.ac.uk/national-museum-of-scotland/whats-on/game-masters/