I thought I saw a door in the side wall of that glass end bit - I assumed that was a little utility room, with the washer (and dryer) in it.
In general, I am sceptical about all these open plan living arrangements. They may work well enough when the children are little, but when they are older, don't you need more spaces (sorry, hate that word) where people can go off and do their thing, without the noise impacting on what other people are doing?
When we moved into the house we are in now, we converted the garages into two rooms - one is my libary-cum-office, and the other was the boys' den - we gave them Sky TV in there, and the playstation, and a sofa - and they could go in there and play their games, or watch whatever they wanted to, without monopolising the lounge - and dh and I could watch whatever we wanted to watch.
The other thing that bothers me about the open plan kitchen-diner-living room spaces is the smells and the dirt from the cooking - I don't use a lot of oil in cooking, but even so, I can see a sort of greasy dust that builds up on the surfaces and cupboards in the kitchen, and needs cleaning off regularly. So if you have one big space, or even a kitchen-diner with a nice sofa at the other end, surely all of the nice stuff in the dining room and sitting room bits will get covered in that greasy dirt too - and won't be as easy to clean as the kitchen stuff is.
Same objection goes for the open shelves in the kitchen, instead of the wall-mounted cupboards - not only do you have to keep everything much tidier than if it was in a cupboard, but it will end up getting manky and needing to be taken down and washed, even if you haven't used it.
Frankly - who has time for all that extra cleaning?? Not me - I have too much to do on FB and MN!! 
