Air pollution monitoring market to rise 20% in 2010 due to greenhouse gas measurement needs
Interesting predictions about the growth in the CEMS market can be found here.
It is pretty likely that as the EPA imposes restrictions and taxes on CO2 emissions that the need to maintain reliable and accurate CEMS will become even more important.
It will also be interesting to see how the Hg CEMS market progresses. As the article mentions, many plants have Hg CEMS that have been moth balled. I have already seen instances where state agencies are starting to arm twist to get data from these systems. They may not be required by the EPA but the states definitely want this data and they are pressuring utilities to provide it. I predict new regulations and even where new regulations are not enacted I suspect that states will start negotiating to add this data to reporting requirements when operating permits are renewed.