While digital copies probably are in most cases quite a bit cheaper to distribute, you have to remember that they require servers to be on 24/7 and have a high bandwidth connection. There are also maintenance costs for servers, that boxed copies don't require (though the machines that make them do).
Nintendo aren't going to regularly undercut retailers anyway. OOT3D is a fairly old game, that has likely passed it's peak, so they can 'get away with it', especially as it is only for one week.
Now. Time to find somewhere with wifi that will let my 3DS connect.
sonicka wrote:We just have to hope that (like on other console online stores) they do come down in price eventually. Because it can actually be a bargin to buy online occasionally. I bought the first Darksiders on sale on the PSN Store for £3.19 yesterday. Sure, it's a game that's a few years old, but it's a price not to be scoffed at. I'd hope Nintendo can be so ballsy with their own titles one day and encourage other 3rd party developers to do the same on their eShop.
As you said, Darksiders is quite an old game, and it has rather a limited audience. Sales at such (silly in my opinion) prices are only sustainable if they are done on mass, often with games at least a year old, that don't have a long lasting appeal. Nintendo games tend to still see rather high demand. As an extra note on Darksiders; it's published by a publisher that recently went bankrupt and was developed by a studio that was one of the few at THQ that wasn't snapped up by another publisher. It's really no surprise it was on sale.
The only games I can see being sustainable at such low prices, are old games (more than a just a few years) that haven't been updated. Nintendo's Virtual Console is rather overpriced.