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*The reason for contrasting its temporal use, is that now as a particle has several other meanings and uses. As a discourse marker, it expresses various contextual and emotive nuances which you can read about here. However, in this page, we're only looking at it uses as a temporal adverb meaning at this moment.Note, however, that using the progressive with verbs that are normally used in the plain present to refer to general life activities like work and live, has a somewhat contrasting effect; it conveys a meaning of doing these things somewhere new and possibly only temporarily.
To see other uses of now that don't relate to time, click here.