According to the front page news in this morning's Western Morning News, and under the headline "Eden in new 'hot rocks' scheme":

Energy independence, hi-tech jobs and a long-term income from exporting power to other parts of the country could be a reality for Cornwall by the end of the decade.

It's not a reality just yet, however, since although the Eden Project obtained planning permission for a geothermal energy facility from Cornwall County Council back in 2010:

More on Will Eden's Geothermal Plans Make Cornwall Energy Independent?