Where do you get this stuff Winterfang? It just isn't true. This is what is changing:
1) WP allows features to multitask (not entire apps), i.e. a feature Microsoft called "background music" allowed us to play music while simultaneously using other apps. Background file transfer was another such feature. For WP8 this will be expanded to features such as background location (navigation) and background VOIP.
2) Devices with more RAM (1GB instead of 512 MB) will allow us to fast-app-switch between more than just five apps.
Both of these concepts already exist in WP7, they've just been expanded upon in WP8. Multitasking in WP8 will be no more "true" than it was in WP7.
In general, WP8 apps will not multitask. Fast-app-switching is the closest WP will get to true multitasking (this is a deliberate design decision). Unfortunately, fast-app-switching isn't something the OS can automatically provide for each app. Instead, each app must support it explicitly, but this isn't mandatory for WP7. For WP8 I hope fast-app-switching support becomes mandatory. I don't know that it will be, but I am hopeful. This would also solve PhoneDog's (and many of our own) issues with lengthy application resume times, which WP can't solve on it's own if app developers aren't willing to do their part.