"should games be considered art" - your best bet is to narrow down the question. If you mean "all games" then I'd argue no. It's not difficult in fact, to argue that most games "contain" art, rather than are art themselves (is a gallery art?). I liked the quote "Games will eventually subsume all other forms of media" - not sure I agree, but I think it hints as to what games ultimately are: A container. A medium. A medium in which certainly art can be produced, but ultimately a superset of what we might traditionally think of as art.
This is of course IMHO. Your mileage may vary.