Bitmaps? The days of bitmaps are long gone :) Smart objects in PS are all vector and so are smart shapes pasted into PS from illustrator. It would be actually criminal to use bitmaps for UI design. Exporting multiple assets for iOS and Android are a single click for me either using the built in asset generator or custom actions. Also, PS generator also has options to exports svg.
Bitmaps? The days of bitmaps are long gone :) Smart objects in PS are all vector and so are smart shapes pasted into PS from illustrator. It would be actually criminal to use bitmaps for UI design. Exporting multiple assets for iOS and Android are a single click for me either using the built in asset generator or custom actions. Also, PS generator also has options to exports svg.