There are a lot of reasons to collect games. For me, it's about 80% nostalgia, 19% hoping the games appreciate in value, and 1% "That'd look neat on my shelf".
The question I'd like to put forth concerns the monetary aspects of games (what's it worth then/now/in the future) and collecting in general. You can make money buying and selling games right now, because there is a rather good market for a lot of it. People who grew up in the 80s are now 20 somethings or in their early 30s. Generally speaking, the average age of "Gamers" today.
With games as a medium rivaling (and actually out-earning) the film industry, I can't help but wonder if my boxed copy of Final Fantasy will be worth more now, or in 30 years when people who grew up in the 80s have more disposable income or even more of a desire to collect artifacts from their youth.
What are your hypotheses concerning the value/market for what I and many others lovingly describe as "Vintage Games"? I don't imagine sealed copies of games will ever be rendered obsolete, but how many seasons of American Pickers have to go by before someone comes knocking on my door to make me a great offer on a shoebox full of LJN titles?