This is not one of the questions you asked, but: I think it would save a lot of frustration if people could use any SD card to upgrade. Some people can use larger ones, while others have to find a 2GB card; some can use FAT32 and some must use FAT16, which apparently is an issue with some computers (not mine). Being so finicky about SD cards seems truly anachronistic to me.
It’s not always easy to separate players and DACs. The first digital piece I owned, a Marantz NA-7004 (I think that’s the number) was a player but I also used it as a DAC in preference to the one built in to my CD player. And it did update itself over the internet.
In a perfect world, there would be a UPnP controller that also had functions to control the DS; like the old eLyric control point, which I still use. There are a number of control points for the iPad, but most of them are not very good, IMO. I like the layout of the eLyric PC and the fact that I can switch inputs, phase, etc. even with the DS. I realize that PSA probably is not going to resurrect eLyric, but that’s my .02.
I don’t see a real need for a separate app for the DS. The remote has all the control functions. I suppose an app is cooler than a plastic remote, but since the PWD and DS do not come with an ethernet connection, there’s no way for non-Bridge users to upgrade firmware anyway. (Or could it be done via USB???)