Lovely in theory, but with the current interpretation of that (i.e. biased toward solar and wind), there is little control over the time of generation and hence little ability to dispatch it at a time that would actually be of benefit. How much of your PV output will assist tonight's demand surge? I suspect its a nice round figure unless you have a street light nearby.
and what do we get instead? lots of wind and hot air...
Even with CHP gas boilers its marginal given they simply shift generation to gas, and do so with less efficiency than a CCGT supplying via the grid.
What's that, a new social network?