Isn't it enough of such really? These (micro)apps which are actually single extracted screens of anything seriously larger can't help to decide about a stack.
What about other aspects of real apps: user auth, undo, back-button action, rich forms, client-side error logging, permalinks, rendering/filtering user markup, uploading/attaching content, drag&drop, notifications, SEO, integration with other useful libs (e.g. bootstrap, highcharts, d3), app extensibility with customer views/plugins?