ROHOS already has more preorders on Steam than MW3, so I guess TWI has done everything right. Also, don't forget that the servers are fully modable, due to mutators and they have included several different game modes that suit the original fanbase as well as new players.
Plus, unlike other Game developers TWI will release an SDK, so mods and costum maps made by the community will Be released soon. We'll get tons of entertainment even without a fully scripted singleplayer campaign.
I'm also quite happy that TWI stays true to its roots and won't dumb the game down too much, in order to attract a wider audience. Free2play weekends, free DLCs and all the stuff I've listed above will sell enough copies and fortunately there's no big multi-million company like EA behind TWI, urging them to do everything for the maximum profit.
EDIT:
According to this post we´ll get a whole bunch of Beta gameplay videos soon (late today, early tomorrow for Euros) since the NDA will expire at that time. Stay tuned!
EDIT2:
More screenshots here.