I think the importance a generic coder or programmer will slowly fade away.
Instead you will have people that are a something that uses programming or has the skill of coding. We are kind of seeing this with the data scientist phenomenon.
Instead of a lot of weight being on which programming language you know, Java or C++ the question will be what kind of domain expertise do you have. There will be a proliferation of many DSL type languages to accompany this.
That's search popularity, but that likely correlates well with actual use. 10 years is nothing to large enterprises, where the huge majority of programmers work. My company has files that haven't been touched in 6 years and still work - why change languages?
I'll just kick this out by saying that widely used languages seem to be normally a response to a problem (functional programming got a lot of traction because of parallel processing), so another adjacent question to these is: what will be the future use cases in tech? Wearable tech, quantum computing (as its consequences), -?-
I'd wager that future languages will be in a similar space as Go or Rust. They will be compiled languages fixing the warts of earlier languages with some distributed computing support thrown in and they will be used to implement efficient, scalable servers.
I don't think ten years is far enough out to really assume a significant difference either in role or language use. i.e. has the role of a developer changed much since 2004? Many of the most widely used languages have been around (and widely used) for 20+ years. And a lot of the languages considered "new and hip" are 10+ years old (e.g. Ruby, Scala).
I think functional programming will be a bit more popular a decade from now, but doubt it would represent a majority of the code being written.
Instead you will have people that are a something that uses programming or has the skill of coding. We are kind of seeing this with the data scientist phenomenon.
Instead of a lot of weight being on which programming language you know, Java or C++ the question will be what kind of domain expertise do you have. There will be a proliferation of many DSL type languages to accompany this.