The thread is going off on quite a tangent but must put my voice in.
From the point of view of running a business at aged 40+ my hubby and I only need to know what is going on for next 20-30 years.
Gas central heating with boilers will still be dominant for that time period.
My prediction
Electric heating will become bigger but still be minority for my working life time.
We need to focus on being heating (air con & ventilation) engineers, not just gas, it is a bigger picture.
Electric will power either
heat pumps or UFH in most new homes and increasingly in refurbs - the future I think.
When I say
heat pumps I think it will be air source to air or water that will be most popular as they are practical & cost effective to install in most properties - not gound source.
Air source
heat pumps are good now much better than past but there is even better technology being developed - read up on USA websites for more about this technology.
And of course houses will be better insulated so less need for heating.
I don't know where that electric will come from but I do not think NUCLear is the only option I suspect there will be solar power PV panels on roofs for electric not for HW.