From the look of it, Freespace 2 is POSSIBLY due to get kicked off its podium as 'best space-sim game ever'. This game looks like it could do it. Its called Tarr: Chronicles. Its designed by russian game developers Kvazar Studios , but dont pass judgement yet. You may or may not have heard about it yet, so here, take a look for yourself.
http://au.gamespot.com/pc/sim/tarrchronicles/news.html?sid=6173082&om_act=convert&om_clk=gsupdates&tag=updates;title;1#I took the liberty of also hunting down some in-game footage.
http://www.youtube.com/watch?v=C4yb4enn40Uhttp://www.youtube.com/watch?v=hrD6njYWYu8I think its a bit of a Freespace 2 rip-off, in gameplay and storyline. Still, it is absolutely magnificent. The gameplay looks gorgeous, the storyline might be a little cliche (Humans seperated from earth, have to get back home, you have to protect your battleship 'Telastra' as it tries to get home), and the fact that it was designed by a foreign game company might impede it a bit and get lost in translation.
It certainly looks more advanced then Freespace 2 though. Though the plotline looks more basic and boring, you can fly over 60 different craft, fighters , bombers and corvettes (they ARENT the corvettes in FS2 we know, they're more like a gunboat (think Satis).
Anyway, judge yourself. Personally, i think it might just be worthy of finally taking up the new podium of surpassing FS2. FS had its day, and its dominated the little-known genre of space-sims, but hopefully this game will bring new light and hope to the genre as a whole.
p.s It has beam cannons as well !!!!