Hi,
When we come to do our kitchen, I will be hanging extra tall wall cupboards just under the coving (100mm cove, so about 80mm down from the ceiling).
I think it would be weird to push the cupboards right to the ceiling.
So - closing the gap?
One option is to use cornice that comes as an (expensive) option with the cupboards. The other is to run more coving round the sides and front of the cupboard. The third is to somehow do a vertical board finish down to the cupboard and paint it ceiling coloured.
Ideally this should all be supported on the ceiling and not the cupboard (in case I want to demount them). Also the cupboard will need to be lifted onto its brackets so I'll need a few mm of gap which could be caulked in later or have a strip pushed in.
As you don't get many kitchens with upto the ceiling cupboards, I'm sort of ideas - both as in what will look OK and the details of how to do it.
I've always detested having big gaps over the cupboards as it becomes a s**te trap and everything gets piled there. Rather have taller cupboards and put the stuff inside where it can stay clean :)
Cheers
Tim