Redmond's upcoming Surface slate is brimming with potential -- but Microsoft recognizes that building its own tablet comes with some inherent risks. In the firm's recently submitted annual report, Microsoft tells the Security and Exchange Commission that the new family of slates could loosen ties with some of its partners. "Our surface devices will compete with products made by our OEM partners," the report reads, "which may affect their commitment to our platform." This, of course, echos Acer's sentiment, which accused Microsoft of forgetting the PC builders that helped it become what it is today. Then again, maybe Acer was just preemptively upset it wouldn't get picked for Windows 8's starting line-up.