Hello.
Like in the tile.
From when uploading version will be able only from Xcode7?
Do we know? Are there limitations like that?
How long Xcode6 will allow to send apps to store[iTunesConnect]?
Not sure. We just (5 minutes ago) submitted an app using XCode 6.4 successfully.
Xcode 5.1.1 is still allowed now, so if that's any indication, v6.x should have a while to go.