You can already auto sort in vanilla with a sufficiently byzantine arrangement of hoppers. It's not very space efficient, but you can indeed do it.

If I still played Minecraft I would probably be more interested in a Terraria style "throw all loot automatically at nearby chests" button than a dedicated sorting block, but given that Microsoft has displayed a dogged insistence on not giving a rat's ass about what the player base actually wants I would not hold your breath for that one.