TG Daily has received word straight from Microsoft that inclusion of hybrid hard drives will be a requirement for mobile systems that carry the Vista Premium logo, beginning in June 2007. The site quotes Microsoft Windows Client Performance Program Manager Matt Ayres as saying notebook PCs will need hybrid storage to obtain Vista Premium Ready certification starting from June 1, 2007. Currently, Microsoft's listed requirements for Vista Premium Ready PCs include a 1 GHz processor, 1 GB of RAM, a Shader Model 2.0-compliant graphics processor with 128 MB of video RAM, and a 40 GB hard drive with 15 GB of free space. There's no mention of hybrid storage on the requirements page yet.