US will, undoubtedly, do a very public rollout of the B-21 Raider next year. They did for the B-2, and they will for the B-21.
China's stealth bomber will roll out shortly after. So late 2020 or 2021. All I do know is that China's bomber isn't for the US but the US bomber is for China. What China aims to accomplish with the H-20 is surely quite mysterious. What can it do that cannot be done by cruise missiles or IRBMs? Certainly it is for Asean, Japan and India.
What has to be noted is the laser defense system development by the United States. Once naval versions of this system hit megawatt levels, they can quite effectively cut through tens of cruise missiles as a sort of long-range CIWS with high accuracy. So bomber platforms still matter because they can at least get close, and in theory, they, in the future, can mount laser weapons or autocannons for attack vs naval craft.
Also remember that a lot of Chinese military development is catch-up phase, beyond its mere deterrence ability. To have a stealth bomber simply means that the Chinese are up to the level of the B-2 or B-21, and that future Chinese bombers will have that as a jumping-off point, whether it be in terms of hypersonics or protected gunships.
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Another thing to point out is that with the advent of laser defensive weapons, short-range torpedoes will have a brief rise to eminence as torpedos, by hiding in the water, can elude laser point defense. Have the torpedo stay out of range while airborne, then dive and perhaps supercavitate as the torpedo aims for its target.
Then there's the talk about Chinese metallic powder torpedoes that can literally boil the oceans from underneath a target ship. Interesting stuff.
On the other hand, there are anti-torpedo torpedoes in development by the United States, but as they're still solid munitions, not lasers, they still represent the same vulnerability with regards to saturation attacks as cruise missiles currently do.
In this case, a stealth bomber becomes an ideal torpedo delivery platform.
