Microsoft is widely expected to unveil its first-generation Surface mini tablet during a press conference on Tuesday. The device is thought to feature a display that measures approximately 8 inches diagonally, and it is also said to include a Qualcomm processor instead of an Nvidia chipset like the ones that powered Microsoft’s earlier Windows RT tablets. According to a new report, however, a refresh of one of Microsoft’s current tablets could steal the show. A pair of reports that popped up this past weekend reaffirm earlier rumors suggesting a new Surface Pro 3 tablet could also be introduced during Tuesday’s press conference. First, Paul Thurrott of Supersite for Windows reported that the new Surface Pro tablet model will feature a larger display than