Built in accuracy?
I'm not sure what you mean by that. Just because you have a track saw doesn't mean your cuts are always accurate. Your cuts may be straight but accurate is another thing entirely.
I'm not trying to be a jerk, I'm just pointing out that there's more to making a proper cut than the tool you choose to use. A track saw makes a straight cut, regardless of much else, making it easier for most users by eliminating that basic skill. This frees the user up to focus on other aspects of the cutting. You still need to know how and where to make the cuts for your project to come out as planned, no matter what tool your using.
If I use a straight edge with my circular saw, I have an accurate, straight, splinter free cut. The same can be said for my table saw, it's just method of work.