Intel is scheduled to launch their Haswell generation PC Processors in June this year.
And sources say that Microsoft is working hard on getting the best out of these processors in their Windows Blue edition which would be the next major update after Windows 8.
It is not clear if Windows Blue would be a brand new operating system or a Service Pack style update for current generation Windows 8.
Reports say that Intel has made massive improvements with battery consumption in Haswell and Microsoft would deliver the goods on the software side.
Windows Blue would be fully optimized for Haswell processors. Users would get desktop like performance with better battery backup on laptops and Tablet PCs.