The medium itself will always be around; however, with governments (finally) realizing that's there's no such thing as an infinite pocketbook, shortwave broadcasters will have to rely on private funding than ever before.
This could ultimately lead to fewer SW broadcast stations. This is also why religious broadcast stations are increasing as well.
That being said, I don't think the larger governments (USA, China, Japan, Russia, UK) will stop broadcasting any time soon but funding for these projects will likely be very tight.
Usage of private transmission facilities could also drive up the cost of SW broadcasts.
The good news is that many service industries rely on SW as a medium for long-haul communication. The long-term ROI is cheaper than using satellites.
Aviation and marine will continue to use SW for many years. Governments have also realized the low-cost value in the SW medium -- even though a lot of these transmissions are encrypted.
Amateur radio has always played a big role in the SW medium and with new technological advancements, it has helped drive commercial SW development.
Eventually, a new medium will be discovered that will forever change the landscape of communications -- but this likely won't be any time soon.
Enjoy shortwave while you can.
