First off, let me say that it is an achievement & improvement and the game should be proud of that after all these years.
But like a lot of people have said here, this isn't really an indicator of anything for the time being, other than "a medium-sized game will improve a struggling console's sales for a few weeks".
The same thing happened with Vita last year - Persona 4. Prior to Persona's release it sold 6k / 7k / 7.5k / 13k (but a Gundam game released the 13k week). After Persona's release it sold 34k / 13k / 24k (Metal Gear Solid HD released) / 13k. Point being, a lot of Persona (with a bit of assistance from some other games) doubled the numbers; but didn't do anything in the long term for the console. Vita had possibly the worst holiday's worth of sales I've ever seen in Japan that year; and it wasn't until this year's price cut + multiple anticipated releases that the weekly sales actually saw a "steady" doubling in figures.
In before: Persona > Pikmin in sales figures. On the numbers here actually, that doesn't seem true. Pikmin 1 & 2 both sold ~ 560k in Japan; the highest selling Persona we have is Persona 1 with ~ 420k followed by Persona 4 with ~ 360k. Persona has the advantage of having stayed relevant during a longer period than Pikmin; but it was also a remake vs. a new title.
In any case, what I'm getting at is that I wouldn't see this as a sign of anything yet. What I will say is that the stream of Wii-U titles coming to Japan later this year do have the potential to do something. But I know a lot of Nintendo fans thought it would've started with Pikmin and ended with SM3DW, and I think it'll start much later (possibly with Zelda). The momentum will fizzle out with Pikmin and I don't think W101 will do anything; they should've been spaced closer together, even though I do appreciate that they were going for one big release a month.
It also remains to be seen what difference lots of titles make without a price cut. Obviously not the impact they'd make with a price cut, but hopefully enough to make it relevant again.