Re: Two reasons
Close, but not quite right. Yes, remote disconnection will be used to give you your own private power cut when it's cold and dark and we find we really do need all the power stations the bean counters said we it was cheaper not to build.
However, there won't be any saving on meter readers (which would have been minute anyway, how much does it cost for a two-minute minimum wage visit every year or two compared to the £400 cost of installing smart meters?). There will still have to be periodic 'safety' visits (translation: to make sure you're not bypassing the meters to get free energy).
The real second reason is price hikes and Confusion Marketing. You'll have to pay more for an Uninterruptable Tariff to stop the Smart Meter cutting you off when there's not enough juice to go round, and you'll have to pay more per kWh if you use lightbulbs after dark, or don't cook Sunday lunch at 2am while you do the washing and tumble drying.
Dumb People have Smart Meters. Smart People have Dumb Meters.