Want to make a timeframe for that prediction? I'd like to record it... While I agree to ignore the criticisms from people who won't even play the game (which includes me, so I haven't commented on it, even though I've played a number of variants on this during high school) I think your prediction here is a stretch. First a quote to consider:

"Linux supports the notion of a command line or a shell for the same reason that only children read books with only pictures in them. Language, be it English or something else, is the only tool flexible enough to accomplish a sufficiently broad range of tasks."

-- Bill Garrett

Now a point about EEs/CEs... it's way nicer to write:

    module dff (
        q,
        d,
        clk
    );

    output q;
    reg q;
    input d;
    input clk;

    always @(posedge clk) begin:
        q <= d;
    end

    endmodule

than to actually lay out and route a flip flop. Of course you're going to simulate such modules, and use graphical tools (the least of which is just to picture signal waveforms), this isn't to say graphical tools are going away or are pointless, but I would readily take the other side on a bet about your prediction since I don't think programming will even in 100 years be something people think of as manipulating graphical elements rather than typing/chording expressions satisfying some grammar/syntax we'd call a language.