https://fedoraproject.org/wiki/Features/Extended_Life_Cycle reads:
Say a desktop environment runs Fedora 9 today, then within a month after Fedora 11 is released, the user can choose to either upgrade to Fedora 10 (N+1), or Fedora 11 (N+2). This is not considered a suitable amount of time for corporate desktop environments, where projects need to be defined, testing needs to be performed, resources have to be alocated, etc, before any of the actual work can be done.
To be honest, I think environments that work like that won't use Fedora anyway if it wasn't supported for at least three, let's say two and a half, years. People hate work, and it would be a lot of work to maintain 5 or even six parallel versions of Fedora. Maybe something like a Fedora LTS version is more likely to be a success. But hey, I like the idea behind it, let's see how it develops.