Both of these points are unfortunately true. With the exception of the included analog controller, NiGHTS didn't really influence future games that much (we went full-3D). And if Sega's hoping to sell this game on its nostalgia value alone, they will be disappointed. The kinds of numbers that made for a hit Saturn game probably wouldn't translate into a hit Wii game. Neither of these points necessarily mean that NiGHTS doesn't matter. It does, because it was a really great game. And that's what we expect from the sequel as well. We're content for NiGHTS just to be a really great game while the Marios and such get lauded as watershed gaming events. We'd all be happier, of course, if it was a real hit rather than a niche game.
The problem outlined in the article is that Sonic Team needs to satisfy the people who have been waiting eleven years for a sequel, while also delivering something that will intrigue new players. Where our opinions differ is that Buchanan seems to think that the classic NiGHTS gameplay is insufficient for a game in 2007, while we think it's great and could go far with enough visual sprucing up and advertising help.