Okay...looked at their FAQ. Not saying it couldn't be used for this, but it sure seems focussed on video and feels like overkill for a text-based game.
In fact, I don't see anything in the API description that looks like an easy way to do text-based game.
It looks like this would be the relevant section of the API:
But then this section
The Data Channel API is not implemented and its implementation is being discussed in the standards committee.
So I think your 6 months estimate is WILDLY optimistic. If they don't even have it working in Chrome, yet, how long do you REALLY think it will be before it becomes any kind of standard???
I like your enthusiasm for new toys, but I think you overestimate the browser maker's sharing of that enthusiasm.