Energy Technology Pathways to Achieving Climate Change Goals "A new report identifies end-use electricity efficiency as the most effective and most economical method to bring carbon dioxide emissions back to current levels by 2050. The analysis uses three scenarios - baseline, global stabilization to 2005 levels by 2050 (ACT), and global 50% reduction below 2005 levels by 2050 (BLUE) - to identify the costs and constraints of advancing the technologies needed for reaching a more sustainable energy future."

Ok, here is the world's plan for energy development for the foreseeable future. You can download and read the entire plan if you are so inclined. I would recommend doing this before you decide to support or (especially) invest in any new or emerging technologies.