However, as you probably heard, Microsoft is now releasing a tablet called Microsoft Surface, which is unrelated to PixelSense. Because of this, Microsoft Surface and PixelSense shouldn't be synonyms anymore.
I created the synonym because PixelSense had just been announced, as had the Surface tablet. So expecting folks to use the right tags for either one would've been kinda silly.
When folks start actually asking questions about the Surface tablet, we can break the synonym; until then, it's probably less confusing to leave it be.