eMarketer has released their latest mobile advertising article, and has said that advertisers will spend up to $1.23 billion on mobile advertising in 2011 in the US, representing an 34% increase comparing with last year and set to reach almost $4.4 billion by 2015. This includes spending on mobile ad banners, rich media, mobile video, mobile search and messaging-based advertising, and covers ads viewed on both mobile phones and tablets.

Also, according to their latest:

This year, messaging-based formats still take the largest piece of the pie, accounting for $442.6 million in spending. But in 2012, banners and rich media will be even with search, each getting 33% of spending, or $594.8 million. That will put them ahead of messaging, which will fall to just 28.2% of all mobile ad spending next year. By 2015, banners and rich media and search will dominate further, and messaging will have shrunk to 14.4% of the total—though still growing in terms of dollars.

Video is the fastest-growing mobile ad format, but from the smallest base. Mobile video ad spending, at $57.6 million this year, will grow at a compound annual rate of 69% between 2010 and 2015 to reach $395.6 million.

Don’t worry, marketing is dead.