If the eye makes it all the way inland and then moves NW paralleling the coast, there will be catastrophic damage. Power will be out for more than a week in many areas. Travel will be extremely difficult because of trees and debris blocking roads.
If you haven't already, evacuate if you live in a coastal county if directed to by local officials!
Matthew is moving west at the present time.
Given my current forecast, here is what the peak sustained winds for the storm will look like. Gusts could be another 15-20mph higher.
Finally, here is the NWS forecast of the storm total rainfall with Matthew. Flooding likely.