The electricity suppliers would like a world where consumption is fairly uniform. In the real world there is a daily cycle of peaks and troughs and seasonal variation. Smart meters and variable pricing is a way for the company to even out the highs and lows of demand by using a variable tariff. In theory it should be win win for all but there is one winner and a rake of losers unless careful legislation, policing and auditing comes in the same box as the meters.
That seems an unlikely scenario to me.