People familiar with the matter told Reuters that some long-time Microsoft collaborators were kept in the dark about the project right up until last Friday, just three days before the news went public.
Microsoft has built up a strong network of hardware partners thanks to the huge success of its Windows operating system.
Calls made, little detail given
According to the sources, Windows boss Steven Sinofsky called a number of Microsoft's personal computing partners on Friday, but only provided them with very brief details, not even telling them the Surface name or specifications.
Steve Ballmer, Microsoft's CEO, has confirmed that the company had informed its largest hardware partners, but declined to be drawn on which ones were included, with Acer and Asus noting they knew nothing until the general announcement was made on Monday.
Damaging in the long term?
The Surface tablet marks a significant step in Microsoft's development, as it's the first time in its 37 year history that the firm has produced computing hardware itself, instead of using original equipment manufacturers (OEMs).
Analysts reckon that Microsoft has chosen to take this route in the wake of Apple's dominance in the tablet market, with the iPad also encroaching on the notebook sector – but will the OEMs still stay loyal after this new move, or look elsewhere… Google, anybody?
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John joined TechRadar over a decade ago as Staff Writer for Phones, and over the years has built up a vast knowledge of the tech industry. He's interviewed CEOs from some of the world's biggest tech firms, visited their HQs and has appeared on live TV and radio, including Sky News, BBC News, BBC World News, Al Jazeera, LBC and BBC Radio 4. Originally specializing in phones, tablets and wearables, John is now TechRadar's resident automotive expert, reviewing the latest and greatest EVs and PHEVs on the market. John also looks after the day-to-day running of the site.