I recently ran across this video on youtube: A bunch of musicians at a church in Atlanta downloaded musical instrument apps for iPads and put on a Christmas concert. They were written up in a Toronto newspaper, which listed a few of the apps they used in case you want to start your own instrument-less band. The set list included Carol of the Bells, Rockin around the Christmas Tree, and Feliz Navidad. Unfortunately no Pete Townsend windmill chords, or Jimmy Hendrix onstage pyres, although the drummer did put a little feeling into his playing.
This gadget freak review highlights some new mobile technologies. Google's Project Tango is building 3D models of the space around you, and the Loop is a virtual wallet that allows you to pay merchants by transmitting your card data.
This Gadget Freak review looks at a simple device for sealing gunshot wounds, an open-source construction set that uses straws and cardboard to build shapes and objects, and a hidden electronic safe built into a wall.