It is silly, yet not.
As already mentioned, there's extra doubleplus masculine branded versions of such things too, and they are usually limited to an extra wallpaper, theme, and preinstalled app in addition to the unusual paint on the outside. You basically just pay more for a slightly more exclusive casing. It's not mainstream yet cheaper than having the case paintbrushed individually.
The marketese doesn't fool around either: It entirely emphasises just how wonderfully "elegant" and "sophisticated" this change of colour is. And the trim, oh the trim, it's golden. It reminded me of adverts for curtains and clothing and such. And let's not forget that matching the handbag is very, very important to some, usually females but by no means never for males, though there it's more usually matching a car brand, likely one they'll never afford. Or their fav soccer team's colours. So there's a definite niche market for this kind of thing.
And there's not even anything wrong with it, except that the "it's for women" is overbroad --plenty women aren't that obsessed with a matched-set wardrobe down to mobiles and the much more expensive laptop--, but that too isn't unusual. It would be more accurate to say it's for the fasion concious, in the same way that a tacky gem-encrusted nokia is aimed squarely at the gilded pikey set.
Oh, nokia had phones with replaceable fronts, and that sparked a whole market of all sorts of replacement fronts. iphones and other smartphones get stuck in aftermarket sleeves with silly designs (I actually liked the microcassette one). And yeah, there are men who like their mobile matched to their jacket, too. But a whole laptop with a fixed colour? That's a smaller market.
Anybody likely reading here --male or female-- knows that it's all about the innards and the colour of the box is nearly entirely irrelevant. So desktop boxes have for the longest time had an ugly sand colour, or usually they're black these days. Laptops aren't much better. Recall what a splash apple made when they suddenly sold computers with bright colours? And, people, that did work pretty well for them, for a while.
We can (and should, as commentards) make light of it, but that doesn't mean there isn't a niche for this kind of thing. The major problem though is that if you get the marketing wrong, you start out with shutting out half the buyers by emphasising it's not for them, and then you risk chasing the rest away because it marks them as susceptible to obviously shallow marketeering. Then again, "not for girls" does get tried too.
As for smaller keyboards and mice, well, there's various sized mice on the market these days, in fact apart from extra "gamer" features, that's the only thing of note that varies. A simple three button mouse without scrollwheel is not even available (so mine's still of the ball variety). And asian market laptops are available in sizes that're smaller than you can get in europe or north america. Swap that all-japanese BIOS for something people elsewhere can read and you may well have a winner already. In fact, the netbook and ultrabook may have both under- and overshot a viable market, actually. Pick a price point between the two, there you go.
Probably shouldn't even try and just paint the thing purple, much less pink. Instead ask well-known fashion designers what colours and designs are closest to "universal" to accessorise with. For it's not really an accessory, can't just swap it out with all that personal info on it and everything. I think that's really the only major problem with the marketing of this thing.