It's a highly political topic.

Blue hydrogen from LNG is more of a research topic / aspirational thing for the fossil fuel industry than it is an actual thing. This seems to be more of a talking point than something that is being done at scale with any decent capture of carbon.

LNG in the industry is of course a thing. Heating things is done with gas and coal mostly. A lot of that will have to be transitioned away to something else. Hydrogen might be an option. But some industries might also switch to other forms of heating. E.g. there are some ways to use electricity directly for this via things like induction or plasma heating. Historically, using fossil fuels was cheap. But when you are going to use vast amounts of electricity to generate green hydrogen for industrial heating use cases, this changes. Using the electricity directly might be more efficient in some cases.