Since the 1970s, the basic format and technology behind the rock concert have remained unchanged. Sure, sound systems have gotten louder, and light shows now incorporate 3D projections and massive holograms — with DJ Eric Prydz’s hologram at his 2014 Madison Square Garden concert the largest to date — but no matter the genre, the setup is the same. So, will the concert of the future look any different at all? At the rate technology’s changing—yes. Since the 1980s, the MIDI protocol has allowed for triggering computer sounds via MIDI controllers that resemble traditional keyboards, guitars, mixers, etc.
Via sight and sound, we’d been transformed: avatars for a moment. Now we were back where we belonged, Americans again, whatever that means.
Jesse Hollington's answer to How is the Apple iPhone battery extender case different than third party versions?
Think of it this way: Using an iPhone battery case simply as a backup, to be switched on when your iPhone battery runs low, is akin to having two glasses of water, but only drinking from the first one — when that glass is empty, instead of switching to the second one, you pour the second glass back into the first. Doesn't make much sense, does it?