The Vision "USS-emulation" (that's my naming of that
) is already live since many weeks.
It is being tested on USS vehicles to perform benchmarking (USS vs Vision) for distances and accuracy.
It is also being used as a backup system for USS Teslas: when USS doesn't work (dirty bumper, not working, etc.), Vision takes place and does the job.
Once they will reach a reasonable parity in benchmarks, they will release it for all vehicles and (my thought), disabling USS on all existing, to have a single software strategy (=reduce development and maintenance costs).
And for USS equipped Tesla owners, it will be perceived as a step back, in my opinion.
The Vision only system already works, it's a matter of tuning and it is being tested in real life with real owners on real streets and situations.
For the blind spot in front ... I'm not so worried that much ... it would be a problem only for (very) low obstacles that move in front of the vehicle that has been stopped unattended for awhile, except if the front camera will just keep watching and calculating moving targets that go into the "blind zone" and eventually moving away.
That's actually not so difficult ... Sentry already monitors 24h a day ... so what's the point in keeping just the front camera watching (if sentry is disabled)?
After having seen real video of Vision correctly measuring distances, I just can't wait for it....