I moved on from Fitbit after 10+ years to Garmin. I have no interest in a watch that has to be charged every day or every other. I get 10-11 days between charges most of the time.
I have a Fitbit Charge 4 and it is great for fitness tracking and the battery is great.
What I am interested in for Pixel Watch (or iWatch if I ever go to the dark side) is getting it with LTE so I can stream music/podcasts without my phone when I'm out walking/hiking. I am hoping that they will offer the Pixel Watch 2 in two sizes with the larger having better battery. An Ultra model to compete with the iWatch ultra would be ideal. I'm also hoping that by then, Google will fully combine Fitbit and Google Fit into one app.