That has been around for a few years, in I think three different variants. I know someone with one, the downside is with it being a rigid case, all the extra (old favourite) tools you'll want to add in can make it difficult to close. Also, do you want to be tied to one brand for all your tools, when you may favour Wiha drivers but prefer say Knipex pliers & snips.
Leaving the actual case aside, has anyone added up the best pricing on the Wiha tools included and compared to the £1,000+ price tag of this as a complete kit? It just "seems" expensive - I for one have picked up some great online offers on sets of Wiha Slimfix VDE drivers, hex nut and Torx drivers from the likes of Screwfix, CBY Tools & others... I just have a hunch that you may be paying £400 for the case, and £300 for tools that you already have or would not use. Maybe wrong. It's certainly not something you'd buy for your apprentice, so I'm not too sure the target market is that large.