you can find some information in the link below. lot of information is available on the internet and all the topmost companies are into it..but what specific newest results your are looking into has to be specified.. at least which area your are focusing into like infrastructure, resource etc....
You will get better answer if your question was more pointed and direct.
Anyway, I'll provide answer in a general sense. yes, Asset Management in power system resources is important. Different companies do things differently. The results were increase in utilization rates, improved efficiency, better return on capital, etc.
Well, every company will claim that way. In competitive market environment, there is pressures on companies to increase their asset utilization rates. Different metrics may be needed for different assets: such as transmission vs. generation vs. distribution.