Current Windows Phone users are in store for a watered-down version of Windows Phone 8 coming to their handsets as WP7.8. It will lack many of the key features that make Windows Phone 8 so exciting, but will still be getting some of the window-dressing and a smattering of more minor improvements. About a month ago, we ran across a list that supposedly presented a breakdown between the differences in the two versions. Now a much more detailed list has leaked, giving us our best idea yet of what to expect from Windows Phone 7.8.
The interesting parts here aren’t so much those features that will make it to 7.8, but the ones that won’t:
So, even for WP7 models with SD card support, the cards won’t suddenly become removable once 7.8 arrives. Likewise, the update situation won’t be going non-tethered, and don’t plan on upgrading to IE10 unless you pick up some new hardware.
Other limitations are more obvious, like an absence of support for features totally dependent on new hardware, like multi-core or 720p; of course, Windows Phone 7.8 won’t change the makeup of the phone you already have.
This document apparently comes from someone with ties to Nokia, as per the specific notes regarding the Lumia 610 and all the Nokia apps. We can probably safely assume that the same additional restrictions apply to other 256MB RAM WP7 handsets.