Owners of older Windows Phones who expect to run out of railroad after 7.8 could actually have some cause for hope -- meager though it may be. A leaked slide, said to originate from a 25-page Nokia roadmap sent to WParea by an anonymous tipster, points toward at least one more update after Windows Phone 7.8 lands. However, it's clear that whoever drew up the slide isn't fully in the know, since the mystery version is simply described as "7.x.". Meanwhile, the o
