What can an iphone 7 do that an iphone 4 can't? What can a Samsung galaxy s8 do that a Samsung galaxy s3 can't?

What can an iphone 7 do that an iphone 4 can't? What can a Samsung galaxy s8 do that a Samsung galaxy s3 can't?

Read more: What can an iphone 7 do that an iphone 4 can't? What can a Samsung galaxy s8 do that a Samsung galaxy s3 can't?