I have not put much thought into this idea. It's not even an hour old in my head at the time of this writing. But I can already tell it falls dangerously close to the category of Awesome, but Impractical. Mostly, I was trying to think of something awesome I could do in the horrible down time between now and August.
I would probably go to an accessible gaming convention, provided not horribly inconvenient/pathetic/etc. The problem that comes to mind immediately is this: would anyone else? And the answer strikes me as a resounding "Meh, probably not".
The community is not that large
There are plenty of gamers and would-be gamers out there who have needs or interests that tie in to accessibility issues, but that's when you consider it world-wide. AudioGames.net has a very international community, with every continent save Antarctica represented (heck, for all I know, Tierra Del Fuego or Ross Island have some members that I didn't notice). That's a great quality for an online community, but it doesn't translate well into meetspace (or meatspace, I never have checked the spelling of that term).
And, well, my focus is the accessibility for the blind element. Most people interested in that are already hanging out at AudioGames.net, or Game-Accessibility, or Audyssey, etc. What fraction of those people would be willing, interested, and able to attend an in-person event like this? Keep in mind that most of them are legally blind, and pretty spread out, even inside single countries. The only conventions I know about that successfully gather blind people on mass are those held by the National Federation of the Blind, and community opinions on the NFB are quite mixed.
What about Corporate Participants?
Something like this certainly could get the attention of related companies: game publishers in the most optimistic case, narrower companies like Freedom Scientific, Senseg, or maybe even Disney. But they need a promise of an audience. While involvement from companies like these would be quite the boost, what incentives can someone like me provide to get some manner of commitment from such comparative giants?
What about bringing in New people?
I do like the idea of using this to get the attention of people who had no idea that blind people playing games was a thing. The more awareness, the stronger the market can become. At the same time, what I'm imagining is running an ad on the local radio station, and maybe five people coming in for the novelty, and that being the end of that.
It's not horribly hopeless, though; there are lots of aspiring game developers out there, and I imagine a decent minority of those people in the general area might find themselves interested enough to make the trip. Still, when you run the numbers, it'll take more marketing skill than I have to pull off something like this.
Reverse Conjunctive Fallacy! You can't just multiply the probabilities of each category and declare the idea doomed! Marketing doesn't work that way!
Exactly why I'm writing this instead of tossing it onto my pile of "kinda cool ideas to get to eventually". Besides, if push comes to shove, I could sit around with the two people that showed up playing Mortal Kombat 9 all weekend.
I might have reason to wind up in the vacinity of the NFB national convention this year, too, which makes for one heck of an advertising opportunity. Sure, I don't have a booth or anything, there (note to self: add "inquire about getting a booth at the NFB National Convention" to today's todo list).
But mostly, the real problem comes down to the fact that I'm thinking about me doing this. The biggest project I've managed to announce and finish with any degree of quality is the JF IM Adventure, which manages to confuse everyone but me, and like one fellow from Indonesia, to whom I gave many tips, especially regarding the early puzzles. While this would be one fish of a victory (... don't stare at the fish!), does it really sound the least bit realistic for someone whose mutant power is to spread confusion wherever he goes?
Now, if the idea sounds worthwhile, independent of the fact that the loser behind this blog is involved, then that means you might could contribute. And that suddenly boosts the potential success of such an endeavor by an order of magnitude.
So, when it comes down to it, there's potential in a new game accessibility convention. Companies, gamers with disabilities, and random people who thought it sounded kinda neat could conceivably carry it to fruition. The more important question is: can I, should I, and what enormous steps must I take beforehand?