PC makers will ship Windows 10 mixed reality headsets in Q4

Microsoft's hardware partners will flood the market with Windows Mixed Reality headsets by the holiday season this year, offering up a new way to enjoy Windows 10.A Windows Mixed Reality headset from Acer is already being seeded to select developers by Microsoft, but isn't available to consumers yet.So far three PC makers -- Lenovo and HP as well as Acer -- said they would ship headsets later this year. Dell is still mulling a release date. The headsets will start at $299, the rough minimum pric