I don't think that Igarashi was being critical of the DS or the N64. The N64 just wasn't known for being a 2D system. I'd bet that 19 out of 20 modern gamers could not name one single N64 title that had better 2D graphics than one single PSX title.
I think that the reporter seemed a bit harsh on the DS though. Also, neither of them seemed to make any mention of Igarashi's failure of a PS2 game.
I think that this is going to be the first true "step up" for the Castlevania series in 8 years. SoTN on the PSX was the high-water mark. The three GBA games were good, but everybody knew they were on "inferior hardware" with the GBA (althought most people didn't mind, since they were good games). Lament of Innocence on the PS2 was a waste of hardware power and development time, but my brother really seems to like the soundtrack CD that he got for free when he preordered the game.
The DS beats the PSX in pretty much every way except for storage space. SoTN was about 450 megabytes. The one gigabit DS cards are 128 megabytes. Of course, Konami was really loose in their storage concerns with SoTN. Instead of having scrolling text for their end credits, they had freaking full motion video of scrolling text for their end credits.
So anyways, I'm hopeful that this game will be good enough to put to rest (among most people, at least) the notion that SoTN is the be-all end-all Castlevania game, in the same way that Fusion and Zero Mission did for Super Metroid.