Indeed there will. Current release date is as always "when it's done", but hopefully during 2009. You can find WineCape's most excellent summary here:
http://www.battlefront.com/community/showthread.php?t=87188
You really should download the CM:SF demo and try, but from the top of my head; 1 to 1 representation for soldiers, much more detailed and deformable terrain, real-time & WEGO option, dynamic lighting, no random map generator, no cherry-picking forces for quick-battles, just to mention a few.