That marketshare BlackBerry shed should have gone to Microsoft. Obviously it didn't. It should come as no shock that BlackBerry lost marketshare in January, but it should alarm you if you want to see Microsoft do well, that it didn't gain any. Microsoft should be doing now what BlackBerry will do in the second half of the year/beginning of next -- slowly, but surely gaining marketshare and solidifying itself as a distant, yet relatively formidable number three to Google and Apple. Follow @rocco_thestreet -- Written by Rocco Pendola in Santa Monica, Calif.