I'd like to see landscape possibilities for the app-menu. With Maemo it was possible to have a portrait/landscape mode for the desktop. That was superb. You could even have a completely different lay-out in both ways.

I think widget on the desktop/appmenu would be nice. Like a weatherapp that's changing it's icon in degrees.

Last but not least: useragent-possibilities on the browser. That's one of the first things I check on a browser: do I only get crippled website-versions or will it be the full monty?