[sam]

Fusion indeed has a realistic chance of being economically viable. Your comment assumes that current technologies remain entirely static which is the unrealistic position. Enabling technologies like high temperature superconductors, advanced computation/simulation capabilities, new high current/high voltage electronics, as well as recent advances in alternate (non tokamak) concepts bode well for the field.

[pfdietz]

Your comment is funny, since "assuming current technologies remain static" is what fusion proponents have done. They have to assume the competition doesn't get better. If solar and wind continue down their experience curves they will be delivering power at a fraction of a cent per kWh, when fusion will be lucky to deliver power at a cost 100x that.