Why would it be needed? So you can strap it to the bottom of a race car and have it track the race track? The 12K sensor was even overkill.

overkill

I use 1000 DPI and nothing higher as I feel it's too fast for me.  My screens in order are 1080p, 1440p, 1080p.

I now see news... I could imagine only how work G903 Hero 16K.
Very hard decision between Wireless G Pro and G903 Hero 16K.
I would choose G903 because I have G900 and that's SO GOD MOUSE.
 
Logitech presented some expensive mouse with suspicious look and I was curious how that could work and how much people will complain and accidentally I bought him and I was surprised. Now I must wait some discount to buy G903 with Hero 16K and to put mine as backup.
 
 

 
Now they have 4-5 models with Hero 16K.
Someone maybe compared with previous sensor? How much last without charging.
Mine G900 3 days. Could be 4 If I disable when I not use him. But 3-3.5 days for sure.
And charge between 2-2 1/2h.
 
G903 is still best gaming mouse after 2 years.
Is it possible that Logitech didn't marked new series with new prefix in name to people know when they become available.
Because months sellers will send first older models to people who order except if they not ask and some of sellers will not be informed what inside.