The infrastructure of a majority of the world isn't equipped to make a cold turkey transition to 100% renewable energy...but I do think technology will help bridge some of the gaps. Much like countries that skipped land lines completely and went straight to a cellular network, the inverse relationship between technology and consumer cost might do the same with these technologies. The biggest concern I have is the wide spread availability of Lanthanides and Actinides in sufficient quantities to support mainstream applications, especially because China holds 80% of the mining and 95% of the refining of these materials. If all nations aren't on the same page, it simply won't happen.