Preseason football usually asks nothing of you. This one is different. Justin Herbert takes the field for the first time in Mike McDaniel's offense, and Jim Harbaugh has already told anyone listening that this is not a throwaway exhibition, it is a dress rehearsal for a season he plans to win now.
That framing changes what you are watching. A new coordinator installing his system with his franchise quarterback under real lights, against a 49ers team that has its own things to find out about itself before Week 1 counts. Nobody is naming starters or promising results. Harbaugh just made it clear he wants this game to look like something, not nothing.
So two teams show up with real stakes attached to a game with none on paper. The moneyline is just the excuse to watch closely. San Francisco or Los Angeles, who leaves Thursday night looking more like a team that knows what it's doing?