The current wankword is "the internet of things", with everything connected.
Maybe preheat the oven before you leave work, because a) you're retarded, and b) you're even more retarded as most cookers have timer functions that even a 5 year old could use.
Fridges and freezers, yeah, can understand them. Washing machines and dish toshers, nah, as you still need some organic mongrel to load/unload them, and is it really that hard to press a button at the same time?
I was going to go into a rant about using gayPhones are remotes for network connected hifi and TV, and how daft that is compared to an old fashioned infrared remote, but suspected chrisgixer may get the hump 
The problem is, the government have been pushing money into renewable energy and people are starting to realise it's a hiding to nothing without being able to manage the load on the grid, so I expect we'll soon have a push for most domestic appliances with high energy consumption to be "managed" in some way. Not much use for a cooker, but for fridges, freezers, washing machines, dishwashers, etc. where it doesn't really matter when the energy consumption happens 99% of the time...
Can't see it ever working unless appliance manufacturers get a bit more serious about developing decent firm/software.