Lead: There are only five more shopping (and marketing) weeks until Christmas. While much of the industry's focus is on shifting compilations and greatest hits in the busiest month of the year, it's what happens on Christmas Day itself that will set the temperature for next year. Lots of people will be getting smartphones and tablets as presents – many of them for the first time. Here, then, is a brand new digital audience for the music industry. So how are they preparing for this and how are they making sure their music and their digital services are amongst the first things that will be tested out on these new devices?