Good point. Every time I visit the website I usually just check Other Games and Off-topic. However I'm not sure a smallish website would be able to make such a drastic move to general gaming and end up growing. Since Stellar dawn is effectively "Paused", it will need new users to join the site and contribute. (because nobody is going to come here looking for the mythical stellar dawn/mechscape mmo anymore)
We kind of already are a gaming website. The "Other Games" is much more popular than SD + Runescape combined. It's been a great place to meet up with people who play similar games and play together.
I think the potential is there for this site to grow. If most of the people who are currently on this site move to the new one (Which I imagine happening without problem) we'll already have a decent if only small community. I think if anything, Stellar Dawn was holding us back from growing. Sure, some people came here looking for Stellar Dawn but if our horizons expanded, more people would come here looking for a good community focused around gaming.
The name of the game here, I think, is offering something other sites don't offer. I have some ideas on that, but I'm sure the staff is already leagues ahead of me in that regard.