Okay, some people do not know how censorship works in the U.S.. First of all, this isn't some government recognition that videogames are art -- it's one source of grants extending to a new medium. Second, the Miller test, which is where that "artistic merit" line comes from, looks for artistic merit in the individual item that is under the gun for censorship, not the medium as a whole. Here's what the Miller test actually looks for:
Whether "the average person, applying contemporary community standards", would find that the work, taken as a whole, appeals to the prurient interest,
Whether the work depicts/describes, in a patently offensive way, sexual conduct specifically defined by applicable state law,
Whether the work, taken as a whole, lacks serious literary, artistic, political or scientific value.
As you can see, very few videogames are capable of failing this test; the only one I can think of that does off hand is
Rapelay, and even gamers were up in arms over that one. Some people really should have paid more attention to their government classes in highschool.
Edit: Also, this will not have any impact whatsoever on the Supreme Court case. There hasn't been any change in federal law, just a slight alteration in who is eligible for a specific grant. Besides, they've probably already made their decision, for better or worse.