I'm not convinced GSW will dominate the NBA for the next 7 years. Curry getting a max deal next offseason (and he's not taking less after this bargain contract he will have just finished) is going to make it really difficult to eventually resign Durant since they won't have his bird rights to go over the cap. I'm not 100% sure, but I created a spreadsheet to analyze their future salaries and I'm pretty sure they need Durant to opt out this offseason, then GSW renounce basically all their free agents to resign Durant. If Durant opts in for year 2, it appears GSW won't have the cap space to give him a max after that season unless they opt-out/trade all their rookie deals and players except the Big 4.
Also, the depth of Zaza, Shaun Livingston and Iguodala will be huge for GSW this season, but they will all likely be gone after this season leaving GSW very thin depending on Kevon Looney, Damian Jones, and other vet mins plus a MLE or whatever similar exception(s) they have.