In the negative - ´det rykker ikke ved noget´ - the expression means it makes no difference.

Here ´rykke´ is more in the sense of pulling or tugging.
Perhaps a shift.

When all companies start thinking on those lines, things will look different, start moving, or something like that.

´Et ryk´ can also be a sudden change - but here I think it is a more gradual transition, with more and more companies pulling in the same direction until something begins to happen, probably an improvement rather than everything toppling over.