GW have worked out that technology is fucking everywhere and maybe they can tap that market. AWESOME!
I imagine the conversation in HQ went a little something like this:
GW guy - "...so, people read stuff on the little handheld screen?"
IT - "yes"
GW - "...and everyones got one?"
IT - "yes, in their pockets"
GW - "so we can just sell the books that way as well?"
IT - "yes, and we can update them remotely so we only have to issue a notice saying 'we've updated some stuff for you, enjoy' instead of a full FAQ every couple of months"
GW - "so we can sell people the same book they already have, and charge them more for it?"
IT - "well, to stay competativ..."
GW - *evil finger tent* "yes... more money... excellent..."
IT - "Ooook. Moving on, we could also make apps, they are little programs that sell for about £2 and can be really usful, maybe we could make one for some of the new rules like our competitors have for their gaming systems?"
GW - "WE ARE GAMES-FUCKING-WORKSHOP! SHIT DOES NOT GET SOLD FOR £2 ON MY FUCKING WATCH YOU BASTARD! No. We will make one of these 'apps' and we will sell it for a vastly inflated price, because our insanely rich fan base will pay... yess....."
And so we reach the point of this soliloquy; GW have a good looking new app on apples app store marketing for £8. Are you fucking kidding me?