no, there's no change (and the auto-sandbox isn't new in V7)
with "new" I meant the new version of the AutoSandbox (the AutoSandbox of the V7 with all the improvements)
that's all I got from the release notes in the first post of this thread:
"Sandbox & Autosandbox improvements"
... okay this said, there are more settings available for manual sandboxing in V7 (Pro and AIS), and that's all I can see. The option to sandbox browsers from the webrep (browser protection) page is meant for AIS and Pro users too ... obviously ... but well I have a doubt now ... anybody running the free version could tell me if the option to run browsers sandboxed is available (again from the web rep section) ... or not? ... it shouldn't.
Auto-sandboxing might have been improved too, but I have no idea how, may be in relation with the behavior and/or the script shield, but this has to be confirmed by a dev here.