Everything launches together
There have been a lot of rumors that Windows 8 for ARM will be delayed for Q2 2013, but our industry sources are telling us loud and clear that everything launches together in Q4 2012.
This means that x86 32-bit, 64-bit, as well as ARM edition of Windows 8 will launch at the same time. The reason is quite simple. Microsoft wants to take at least a bit of the emerging tablet market from Apple and Google.
Currently the adoption rate of Windows 7 for tablets is quite low, and Microsoft has played with the metro interface and made some radical changes mainly to please the tablet users that might have Windows 8 on their future devices.
Microsoft entered the app store game quite late, and it is also late with a tablet-oriented operating system that supports ARM, but better late than never. If we were to speculate, we would predict that both Apple and Microsoft will try to merge its mobile and desktop operating systems in one that would give them a lot of leverage against Google, as it lacks doesn’t have a decent notebook / desktop operating system.
It all starts in Q4 2012, at least from Microsoft side.