The intention, I think, is that you'll use them for your most ornamental presentation dishes, that are saved for best.
If you don't have such things, I'd suggest using them for the rarely used items rather than for pretty things, but that's because I have more rarely used gadgets than decorative kitchen-/table-ware, and am of a practical nature.
In practice I also use my more inaccessible kitchen cupboards for reserve ingredients - the spare packs that I'll need next time I use a large quantity, the cupcake sprinkles, anything that I'm not likely to want suddenly.
But it's very much a matter of personal taste - what do you like about your kitchen? Its appearance? Its place as the centre of a home, where delicious things are made? It also depends how much you need the space - in an oversize kitchen you can use them for purely decorative items, whether that's vintage china or jars of dried chillies you selected for show.