cctld's play a different role to gtld's - they let companies be patriotic or define the scope of their activities - so it could well carve a niche of its own as the us has never really had a usable cctld and with .com being less us-centric than it used to be.
With it being a relaunch, and with the current patriotic feelings - it should be good, but there is always a chance that over speculation could kill it before it gains momentum.
.com is a good speculative domain because significant volumes of end users were registering and using the domains well before speculation with domains became as widespread and understood as it is now.
IMO, .biz and .info will struggle to get the momentum of end user usage/promotion needed to make the speculative registrations valuable. Its catch 22.
Hopefully, people will WANT to register their company names in .us to show their roots - which you don't get with .info or .biz.