i thought of this left out in the cold scenario for the samsung moment but id like to consider a more positive outcome. like someone mentioned theres already a couple of good OS's out there like webos, iphone, android and WM. that would mean that the samsung os would have aim to be better than all three. sort of like WEBOS came out with iphone os on its cross hairs. so we can assume this will be a good OS . really there is no indication they will release some crap that cant compete with the Mobiles of today.
now if your concern is that you wont have android 2.0 lets consider
this os is probably 6-8 months away. any sooner and it would mean that they have done alot of work to spit this thing out fast but no real way of telling. so its still likely that they can come out with 2.0 for the older phones and BADA for their new hardware. after all they have 190,000 employees world wide.
considering Droid with 2.0, i can guess updates for HTC phones would becoming in the next 3 months.(again a estimate) so BADA would have to be good enough to compete with android 2.0 and be strong enough to compete with WM7. if this is a estimate of 6 months then i would assume that the MOMENT would be rooted and dissected for any rom you decide to put in it.
the bad part.
that means the MOMENT with no 2.0 would be on 1.5 ( immature OS) for 6 months then be with another young OS (bada).moreover it would be competing with phones that would be made to draw attention to the market,so expect 8 megapixel amoled 800x480 3MM slide out phones or something along those lines. updated hardware usually blinds people from mediocre software (HD2). leaving our fat moments lonely.
the good news is that bada is an open os. much like the android. so what we can be looking at here is a situation more like Linux distros for the mobile market, something like Ubuntu , Fedora and others. if this is the case then we all win
besides its probable that if you have a HTC phone youll be trying to get BADA on it and if you have a samsung phone youll be running android.this is the nature of everyone that loves to hack phones