I don’t think it does any harm, it may hold some weight, nobody can really tell you for certain. Some will say google will ignore it as a factor in recent algorithm changes, some will say they don’t give it as much weight as they used to.
Personally I don’t think it can do you any harm and is plays a small part. Why wouldn’t it. If your domain name is e.g {kit-cars} and your site content is all about kit cars then google would IMO be foolish not to give some weight to it.
That’s my 2 cents
There is still a lot of weight by Google in the exact match domains. A lot of searches will reveal this, as there are exact match domains on the first page of Google results, almost always.
So what I am trying to say is that this is the most effective way to get good rankings, as it involves no effort.
However you can always compensate with exact match anchor backlinks the lack of kw in the domain name. But this option is very work intensive and takes time. 
I think Domain suggest your business Identity so for me Domain has its own importance its also play a vital role in SERP also !
This has been discussed quite a lot already, and does not need any new discussion at this moment in time.
Please refer to any of the following threads, or search our forums.
http://www.sitepoint.com/forums/showthread.php?821592-New-domain-or-old-domain[/quote]
Thread closed.