This is huge and going to be a major game changer, so Adobe you had better put this into Premiere ASAP. Not only text to audio, but being able to record a scratch track for timing!
Honestly as a commercial and direct response editor I have seen less and less put into audio. I used to at least have a mixer to do an nice mix, but especially since the pandemic I have also had to do a mix (and while audio is not my thing I have become much better at it) but being able to add sound like this so quickly will certainly bring projects to another level.