I still favour huge hydro developments, with a large backing-up lake for irrigation, drinking water etc. The trouble with under-sea hydro is the marine growth gumming up the works every 5 years or so.
Solar - great if all south facing roofs in the UK had to put solar slates on ! The politicians might get the message in another 20 years.
Wind - needs new machines that will last longer and cope with gentle to excess of over 54 mph winds. I saw a great TV programme where the wind on a high rise building supplied all it's power with some to spare.
Apparently there are desperate drought areas in the USA and Brazil. Largely due to lack of forward planning and mean capitalism.