I want a webOS dock in windows (replace the crapware HP dock that HP windows machines come with) I want this dock to look exactly like the 5 buttons on the webOS tablet with a just type bar included. I want this to autosync with my touchpad and (as long as both are online) keep the most recent version and state of everything on both. If one goes offline then do a 1 to 1 comparison and if the version has changed in both places ask me which to keep. This way I would always have access to my applications and it would be continuous and smooth without most of the downsides of the cloud.
Complicated and over the top, yes, but it would be awesome.
Other more important, but less cool things:
power savings mode -when Symbian users were asked what their favorite feature was hands down the ability to toggle bluetooth, the 3G (and obviously 4G) radios, drop the screen brightness, no animations, screen off, under voltage, etc all with one button, won. While it is important that some of this is dynamic too (no need for the 3G/4G radio to be on if the OS knows the screen is off and only the regular data is being pushed) sometimes people would rather wait for their phone and have a longer battery life even under use.