This year the Randa KDE meeting it’s all about Accessibility: a big effort has been concentrated around two very intertwined things: keyboard navigation and screen reader support.
(The fundraising campaign is still going on)
As a first taste, in Plasma 5.11 KRunner will be completely accessible (unfortunately until now screen readers didn’t work at all with it), which is important as is a completely keyboard-focused UI to do things, therefore potentially more user friendly towards vision impaired people.
Orca will be able to read out loud what query has been entered and the currently focused entry, that is what will happen if the user presses the Enter key.
Here it is a screencast of KRunner running with Orca navigating trough the list of result entries.