Coming from a background of art philosophy and game studies, Tavinor makes quite a convincing argument for the potential of videogames to be art. Discussing issues of narrative, morality, transgression and so on, he builds up a structure that indeed does fit in with cluster theories of art. Yet he also includes lots of critique - some of which he refutes, some he admits as indeed valid - and thus shows a definite professionalism in his argumentation.
I was a bit disappointed with the lack of certain key references, including material from the philosophy of games (a field right between the two he extensively uses, which he strangely skips even when it would support his arguments a lot). And the author also seems quite ignorant of how some modern larps and pervasive games take what he considers artistically "unique" and "special" in videogames way further than his digital example games do, particularly in narrative-creation. Yet compared to many nearly canonized books of game studies, his ignorance is quite minimal, and the approach is much more open-minded and inclusive (if critically so) than most.
Of particular value to games research scholars are the parts on the potential impact of various types of fictionality to game-related moral issues, Tavinor's critique of immersion, and his strong defense of re-taking the word "interactive" to its proper use. Also, quite an eye-opener to people holding a highly elitist notion of what the word "art" may and should mean.