Single-page app: The initial page loads very quickly and asynchronously fetches the list of tables, table statistics, data sample, and partition list. Subsequent navigation clicks will trigger only 1 or 2 calls to the server, instead of reloading all the page resources again. As an added bonus, the browser history now works on all the pages.
These are some nice changes. I still don’t think a web app replaces quality tooling (like Management Studio), but if a web app is what you have, it should at least be nice.