The popular rumor floating around at the moment is that Microsoft intends to announce self-branded handsets powered by NVIDIA's beefy Tegra architecture for next-gen phones and MIDs at the GSMA's Mobile World Congress in February of next year. Let's put aside for a moment the fact that Redmond continues to vehemently deny having any interest in getting into the hardware end of its Windows Mobile racket -- concealing the truth is a part of doing competitive business, after all -- and turn our attention to the practical matter of whether this makes any sense whatsoever. First off, Windows Mo