Not really. Personally, I am very fond of older graphics, and while I will check out new ones, I will mostly stick to old. I believe same thing will be with most current content creators.Oh no...
As I see some people are worried about all old maps, skins, and models which will not work in Warcraft 3 Reforged. But personally for me exist more important and frighting question...
Are all hive content makers of Hive, and other forums will forget old Wc3, and Warcraft 3 Reforged will be more preferable for them just because of graphics?
Also, take in mind, that this may draw more people to warcraft 3, making it more popular again. We'll introduce them to old & gold game