Big business has had actually very little influence on many aspects of the development of the Internet.
Why because big business cannot react fast enough to change. In the case of the alternate roots for them to attract the attention of big business they will be so well established that all big business will be able to do is pay big bucks for prime alternate root real estate. If the experience of .com is any example. Where was big business in when loans.com was first registered for free? They waited until 2000 and paid $3,000,000 for it. The best thing that can happen to the alternate roots is for them to grow to the size and importance that will attract the attention of big business.
As for big government. The US government has tried to keep out of the Internet for a long time. I mean www.nic.cu
(Castro's Cuba) is in the US government contolled "A" root. And the Soviet Union .su still lives on in the US government "A" root. The Russians at www.nic.ru
offer the registration of for example lenin.su for $1,000 US. On the other hand other governments might even welcome aternative roots to that controlled by the US government. A more likely response is that big government like big business will do nothing untill the alternate roots are so well established that big government will not be able to stop them.
The biggest obstacle to the alternate roots is that one needed before to set the DNS to the alternate root creating a second point of possible faliure for resolution of a .com domain. Many an ISP would be reluctant to take the risk. The technology that www.newroot.com (pacific root)
is proposing actually allows direct resolution of the "A" root domains by an ISP even if the alternate root were to fail, and vice versa in effect creating an even higher level of redundancy for a site that can be reached a www.newroot.com
domain and an "A" root domain.