Re-arranging the tool-buttons was already implemented in Select 3, it's just been expanded in Select 4 to include a 'footer bar' option. Indeed, one of the options already in Select 3 was to put the window close button at the far right, like Windows. It's also possible to put the iconise button at the left of the title-bar, next to the close icon, like in Mac OS X. So both major OS's have their window-button style supported since Select 3. Ofcourse, putting the scroll-icons next to each other such as in some UNIX-like OS's is unnecessary, thanks to the superb Adjust mouse button functionality.
Like I said, besides EDID support there were some other relatively major features planned for Select 4, such as ATA-4 harddisc support (with HForm and FileCore overhauled to support the latest ATA standards and SMART features), search-as-you-type in the Filer and Keyboard control for the Filer. I wonder what happened to them, since at least the search-as-you-type stuff was shown at some shows, I believe. There also were some small buttons at the top in Filer windows. Have these things been scrapped due to lack of funds or urgency to release something to counter further loss of subscriptions? Or will these features, of which some were apparently already implemented, arrive in a later release such as Select 4i3?
By the way, I found the PDF file I linked to above much more readable than the 'official' RISC OS Six Key Features page which details the New End User features.