Seeing how Photoshop is raster based artwork and I am working on a retina display I would like to design (setup my artboards) at 2x the native size the artwork will appear (the native display size) so that I can see what I'm doing. If I were to design at the native size the artwork appears at half the size on my screen, because I'm working on a retina display.
Using the example that the native size of that artwork will be 300x400px and setting the workspace to 72dpi:
Is it as simple as making artboards 600x800 (2x native) and then when it comes time to export artwork I do it at .5x that it will create jpgs at the native size 300x400?
I heard 1px line weights and font rendering can be affected working like this and wonder if this is seamless or there are things you need to take into account working like this?