The problem with this approach is that you would need a brand new kitchen along with everything in it. Plus, after spending vast amounts of money doing so, you might find that the new kitchen, appliances, utensils etc. are no longer suitable for use by humans for those times you want to do a bit of old fashioned manual cooking (or are forced into doing so during system upgrades etc.).

What I'd like to see is a general purpose domestic robot which could learn to use all your existing things. It could start by learning to vacuum using your existing vacuum cleaner (a lot cheaper, and a lot better at cleaning, than the dedicated vacuuming robots you get now), and over time upgrade itself to do additional things, like emptying the vacuum cleaner, dusting, washing dishes and so on.

Would love to develop something like that, but coming from the software side I'd probably have to work with some pre-existing hardware, e.g. something from Willow Garage.