For edges that are jagged (cables, wires, corners and such), I go back in and do some manual smudging and cloning. Of course, it would be nice if there were some sort of useful anti-aliasing option, but there really isn't one.
What we do here is screenshot ART... that means if you want to make your shots all fanciful, don't be afraid to do a little dirty work. Don't always rely on those magical auto-features. Real life artist usually don't have the benefit of a computer anyways.
Ok, more specifically... if wires are jagged or pixelated, I draw my own lines and vectors on top of them (on a seperate layer). Then I simply delete the old lines (using the clone tool), and voila. Fade and blur your lines when necessary.
Edges are even easier... just smudge and clone...
*And if anyone wants to compare, here ya go:
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Original
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And don't forget to come up with your own ideas whenever possible. Hope this helps everyone!
