Yes, and many will use Genie+. But “most” will not. Early reports from WDW are that 33% of guests are using Genie+, and there’s an argument that fewer guests at DLR would because there are so many APs.
So it will have an impact on standby lines, but not a huge one. And the popular rides will continue to be popular at rope drop. That’s my expectation, anyway. We’ll see what happens … tomorrow!