During the MWC I’ve heard more than once that one of the few things that were worth visiting was the stand of Modu Mobile.
I did not get to see them, but I was told what the device is. Sounds interesting, but I’m not sure I’d like to buy all the extra “jackets”.
I’m not the average consumer, of course and if they get some nice design on the jackets might easily become trendy. Remember the old Nokia covers? Make sure you check their site, it’s definitely worth and they have nice short videos explaining how it works.