Well, that appears to be entirely based on lower stipulations on the emissions from the power stations, so, a big red herring which will no doubt be seized upon by the fossil fuel lobby, who will conveniently miss represent the information.
Simply put, yes biomass is a greener fuel than coal, everything else being equal (that's an important thing to note).
The co2 released by burning biomass, is the co2 absorbed when that plant matter grew, as is the co2 released by burning coal.
The difference is, one is co2 which has been locked away for millions of years, the other, maybe as little as a year.
Chopping down ancient forest to burn is obviosly not a good idea. Growing new, fast growing trees for biomass on the other hand is. It can only release the co2 it absorbed in the first place!