With Vitali retiring now gives an opening for some great fights down the line. I mean there is some exciting fights out there in the world heavyweight decision but the fights are not being made as people are jostling for a world title shot and both brothers with the retirement of the elder sibling it leaves an opening for these fights to be made.
Chisora had his chance against Vitali and flopped. Dull Boy is a one loss away from being a journeyman
I doubt he'll go on for ten years. Much more likely is that he unifies the belts within a year, defend said unified belts three or four more times and then retires in say 2016.
Wlad too good for current crop and the mediocre around the corner such as Dull Boy Chisora. Anthony Joshua is his next big challenge in 2017.