Overall, most Americans anticipate that the technological developments of the coming half-century will have a net positive impact on society. Some 59% are optimistic that coming technological and scientific changes will make life in the future better, while 30% think these changes will lead to a future in which people are worse off than they are today.

But at the same time that many expect science to produce great breakthroughs in the coming decades, there are widespread concerns about some controversial technological developments that might occur on a shorter time horizon:

• 66% think it would be a change for the worse if prospective parents could alter the DNA of their children to produce smarter, healthier, or more athletic offspring.
• 65% think it would be a change for the worse if lifelike robots become the primary caregivers for the elderly and people in poor health.
• 63% think it would be a change for the worse if personal and commercial drones are given permission to fly through most U.S. airspace.
• 53% of Americans think it would be a change for the worse if most people wear implants or other devices that constantly show them information about the world around them. Women are especially wary of a future in which these devices are widespread.

Many Americans are also inclined to let others take the first step when it comes to trying out some potential new technologies that might emerge relatively soon.  The public is evenly divided on whether or not they would like to ride in a driverless car: 48% would be interested, while 50% would not. But significant majorities say that they are not interested in getting a brain implant to improve their memory or mental capacity (26% would, 72% would not) or in eating meat that was grown in a lab (just 20% would like to do this).

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The legal and regulatory framework for operating non-military drones is currently the subject of much debate, but the public is largely unenthusiastic: 63% of Americans think it would be a change for the worse if “personal and commercial drones are given permission to fly through most U.S. airspace,” while 22% think it would be a change for the better. Men and younger adults are a bit more excited about this prospect than are women and older adults. Some 27% of men (vs. 18% of women), and 30% of 18–29 year olds (vs. 16% of those 65 and older) think this would be a change for the better. But even among these groups, substantial majorities (60% of men and 61% of 18-29 year olds) think it would be a bad thing if commercial and personal drones become much more prevalent in future years.

Countries such as Japan are already experimenting with the use of robot caregivers to help care for a rapidly aging population, but Americans are generally wary. Some 65% think it would be a change for the worse if robots become the primary caregivers to the elderly and people in poor health. Interestingly, opinions on this question are nearly identical across the entire age spectrum: young, middle aged, and older Americans are equally united in the assertion that widespread use of robot caregivers would generally be a negative development.

Ref: U.S. Views of Technology and the Future – Pew Research Center