Basically it means "Kingdom Hearts fans, please wait 6 to 7 years".
But with all honesty, I think it's alright. It's not as if they didn't release a bunch of KH games over these years. Sure not all of them are up to pair of what we saw on PS2, but Birth by Sleep was so good it even made a person who didn't like KH like myself to have that game as one of the best PSP games. I just got KH 3D but haven't even touched it yet, but I also heard a good amount of nice things about it.
Micromanaging aside, I loved KH3D, though it seems to be more a matter of debate among fans. I thought it made the *best* out of the Disney worlds this time around. The Disney version of Notre Dame is beautifully created to include every part of the movie and then some (and a goddamn duplicate of the cathedral itself!!).
Anyways, any qualms people have with it, I will say it's a solid handheld.
And yeah, I'm really, really excited for the "2.5" Remix we see of KH with both KH2 and BBS on there. I loved 'breaking' BBS especially, and playing it again without any lag and all the bells and whistles of the Final Mix will be a real treat. ...and maybe a real chance to take on the Mirage Arena since networking on the PSP was a pain in the ass.
KH3 can take its time. Hell, be great to see what worlds they can work in (Tron: Legacy was a great and recent addition to KH3DS; if the movie was 2010, and the game was 2011, then I'm curious if there might be worlds yet unannounced). I'm excited, but the "trailer" they released looked more like a tech demo, so I'm not surprised they showed off KH3 waaay, waaaaaay too early and we'll be seeing it for like the 15th anni of the series.