Value is a subjective term. Those updates you mention would definatly make the place more sale-able. It would depend on what your property is being compared to. If what your being compared to has updated electrics, insulated and generally updated then it could be just an expected condition. Just as how stainless steel appliances have become rather commonplace.
In my general opinion buttoning up the exterior, proper insulation, current & modern utilities & systems would be the starting point. Having a state of the art kitchen & bath wouldn't mean much if the roof is leaking, there are cold drafts and not enough electrical service. All of the work should be properly permitted & performed by professionals whenever the work requires. Electrical, plumbing and even insulation need special knowledge & skill, always best to consult with local inspectional services and a licenced contractors.
Hope that helps