L5 GPS will address the multipath-in-urban-canyon problem that Uber worked on.
Also E5 Galileo [1]. It's such a shame that so few smartphones have support for dual frequency GPS and Galileo.
[1]: https://gssc.esa.int/navipedia/index.php/Galileo_Signal_Plan
Is it really so few? Snapdragon got support for dual frequency in Snapdragon 855 released in 2018. Use the GPSTest app to see if your phone supports it.