A portal gun would still probably be the most massively useful device in existance, (other than a towel, of course.) so I guess the ability to create portals to any place that i've been to or can see. Think about all the time spent in traffic or walking to here or there. Now, there is no need for most travel, no gas, car or time wasted.
Also, immortality, that would be interesting, because there's still a massive number of things to do, all of those cost money, if you could dedicate one lifetime to amassing money, then, have fun, then do something awesome, become a millionaire/billionaire, and do more awesome things. Plus, i'm just curious as to what's going to happen a hundred years from now.
Also, immortality, that would be interesting, because there's still a massive number of things to do, all of those cost money, if you could dedicate one lifetime to amassing money, then, have fun, then do something awesome, become a millionaire/billionaire, and do more awesome things. Plus, i'm just curious as to what's going to happen a hundred years from now.