I would love to be able to use vendors to get stuff even when offline (specially from Xür, you know). Sometimes I want something so simple as to change my emblem for one I have to go to the new panel to get and have to wait to go in-game. At least Postmaster, Emblems and Shaders should be useable like this because there is no resources involved. Other vendors will consume resources and can be accessed from a computer I left my account open and could result in people complaining to Bungie they didn't do that. That's why I believe we won't be able to infuse/buy/destroy items through this interface ever. And characters side-by-side on the same screen is a must.