Probably largely a matter of what we have now, but smaller/lighter/faster. Handheld computers that are little more than a flexible screen and a battery, for example.
Viable nuclear fusion, hopefully. There may be a functional prototype power station by that time, capable of indefinitely sustained fusion and generating at least 2GW above input power. It's not hoverboard stuff - it's due to be working by 2033, they've been working on it since 1970 and they're ahead of schedule. So it's a very real possibility.
Large improvements in batteries. There's a lot of money in batteries, so there's a lot of work being done on them, from small ones for handheld devices to massive ones for national grid level power storage.
Largely as a result of the above, practical electric cars on a significant scale.
New medical stuff seems likely:
Lots of more muscular people. There's a drug being tried on humans right now that shows up to 70% increase in muscle mass in mice without any direct side effects. It's intended as a treatment for muscular dystrophy, but it's bound to find its way into a wider market. There are chemical markers animals use that essentially act as a signal to say "that's enough muscle". All this drug does is gather some of it up, so the signal reaches the cut-off point later. Hence the apparent lack of side effects.
Medical nanobots. Seriously. A couple of months ago researchers managed to devise a way to power them, a crucial step. They do nothing yet, but they exist in vivo (lab animals). Probably only very early research stages by 2030, though.
Much more speculatively: slower aging and a blanket cure for all cancers, courtesy of nature's own collection of ugliness, the naked mole rat. Lives 6 times as long as expected and is immune to cancer. Researchers now know why. Maybe it can be applied to humans, possibly.