That's pretty much the question. People are scared that samsung won't support it.
I always wondered why, when you are paying a substantial contract fee, you aren't guarenteed updates for the life of the contract. If they could make the case that my fees aren't enough to guarentee the updates, I would probably *still* pay a little more for the peace of mind that I'll have updated software. It seems as if the fact that the manufacturers and the providers aren't paying much for the development of Android, it would be reasonable to expect timely updates to the OS.
I guess it comes down to the numbers: do they make more money by forcing device upgrades (sans all the discounts), or from keeping customers longer through satisfaction and the user experience. The rapid released of Android versions has probably made it easy to make more money and justify ignoring updates and focus on forcing hardware upgrades. Hopefully in the near future, Google will lengthen its release cycle and promote a focus on software support.
I think I'll stick with the Atrix for now. The hardware is similar enough, that I can take it over the new galaxy based on MOTO's reputation, the earlier release date, and how it looks (personal taste).