At this year's CES you'll hear plenty of talk about driverless cars, connected homes and the internet of things. (Yes, we promise IoT, perhaps the buzziest of tech trends, is more than just hackable baby monitors and $400 internet-connected juicers.) Here's the technology that will drive all of those innovations over the next decade: 5G. The shorthand tag "5G" stands for fifth-generation wireless technology. Those broadbandlike wireless speeds you're getting on your phone now? That's 4G technology. So just think about what happens next. If you're excited about the prospects, you aren't alone. Tech observers see 5G as the foundation for a host of other trends. At last year's CES, Qualcomm CEO Steve Mollenkopf described 5G as the biggest thing since the introduction of electricity. Remember, a lot of work needs to be done for 5G to achieve broad scale. But with networks set to go live by 2019 and coverage reaching 20 percent of the population by 2023, now's the time to start caring about it.