Yesterday a huge announcement was made on the Mothership with regard to GP coverage. The long and short of the changes is that live WotC coverage will be limited to a maximum of one event per week.
While live coverage will be scaled back, text coverage and decklists will continue to be published, and the verbiage of the announcement suggests that we can expect to see more content with footage from events that weren't broadcast live. I would assume this means features similar to Walking the Planes in lieu of a live stream.
Third party coverage from companies like Channel Fireball and Star City Games will still be available for GPs run by these companies.
While a reduction in coverage doesn't seem to have any financial implications on its face, camera time can be a substantial factor in MTG finance. All four PTs will still be broadcast, so the largest source for camera-driven spikes will still be around, though whether there is coverage for a particular format in the near future should be a factor for if and when to invest in a position.