According to the article, SkyBox 1.5 will require a minimum of WM 6.1, although even that would leave a lot of people in the lurch. What's funny is that there's also mention of "a select few non-WM phones". That's the real oddity to me.
"A planner is a gentle man, with neither sword nor pistol.
He walks along most daintily, because his balls are crystal."