After a couple of weeks after Niantic had taken away the footprint proximity feature, a new “nearby” feature has been introduced with the latest PokemonGo update.
This new addition seems to have replaced the footprint design with grassy patches called sightings and nearby locations for certain Pokemon (pictured below).
However, it has been stated in the update information that:
We’re currently testing a variation of the “Nearby Pokémon” feature with a subset if users. During this period you may see some variation in the nearby Pokémon UI.
So for the time being some players will not notice this new change immediately. From personal experience i have only been able to see the Pokemon in the ‘sightings’ category.
Many players have been waiting for a functional proximity feature to roll out, and some have even drawn out a possible system for locating Pokemon such as this idea from a Pokemon Go player, but perhaps this new update will bring more hope to the table.