2D Vector graphics support is a must for Unreal. Hopefully it will come sooner than later.
Displays come in all kinds of sizes and resolutions these days, creating raster assets for different resolutions is both tedious and a waste of space for many kinds of 2D assets.
Such support will be immediately useful for Slate/UMG (allowing for resolution independent UI assets like icons, buttons, etc) as well as Paper2D (allowing for resolution independent game assets like characters, backgrounds, etc).
This topic has come up in various posts spread across all the forums. I think it would be useful to centralize discussion in a single place to help show Epic how many people would be interested in such a feature, so they can make it a priority.
Please voice your support.