CPV equipment is somewhat more expensive as an upfront capital cost ($/W), but it's higher efficiency means it will produce more energy over the entire lifetime, so it's levelized cost of energy (LCOE) is competitive or better than traditional thin film or silicon panels. The LCOE will depend on the strength of the solar resource at the site, so sunniest locations (California and SW states) are starting to see grid parity for solar technologies, both standard and CPV.
Since CPV is less mature, it is expected to have better % improvement in efficiency and %decrease in cost over the next 10 years, leading to knock-out combination.
This 2008 paper has good explanation and some values
http://www.slideshare.net/warlor/levelized-cost-of-electricity-for-cpv-paper-nishikawa 
