The debate can now be laid to rest: devices currently running on Windows Phone 7.5 will not be on the receiving end of the long-awaited Apollo update (aka Windows Phone 8). But that doesn't mean those smartphones are at the end of the line. It's long been speculated that the reason Microsoft would want to restrict WP8 to new phones is primarily due to improvements in hardware support and the change in platform architecture, and this conjecture appears to be right on the money. After all, how can single-core devices with WVGA screens take advantage of multi-core and additional resolution support.
2DayBlog.com , Microsoft confirms no upgrade path to Windows Phone 8, unveils 7.8 for legacy devices, Microsoft confirms no upgrade path to Windows Phone 8, unveils 7.8 for legacy devices