Apple's new iOS11 and MacOSX High Sierra support HEIF(High Efficiency Image File Format). The file extension is ".heif". The feature of this format is that the format uses HEVC as a image compression and the image quality is the same as JPEG format quality at the half file size.
I was hoping the defect standard format should be migrated to a high efficiency image format.
However, we do not know whether other device vendors follow the Apple's this strategy.
JPEG2000 is supported by Apple devices but Windows and other softwares do not support it.
On the other hand, JPEG XR is supported by Windows but MacOS and Lightroom do not support it. Photoshop does not support JPEG XR too. So, Microsoft's plugin is needed to handle JPEG XR on Photoshop.
Download JPEGXR Plug-in for Photoshop (Windows) from Official Microsoft Download Center
https://www.microsoft.com/en-us/download/details.aspx?id=52369
Download JPEGXR Plug-in for Photoshop (Mac) from Official Microsoft Download Center
https://www.microsoft.com/en-us/download/details.aspx?id=52381
The response from Adobe
According to the answer from an Adobe staff on this thread, they are checking HEIF but there is no timeline to disclose.
Photoshop/Lightroom: HEIF support for iOS 11 | Photoshop Family Customer Community
https://feedback.photoshop.com/photoshop_family/topics/heif-support-for-ios-11
Therefore, we can not know their strategy.
Although Photoshop supports many formats and can increase supported format by plug-in, Lightroom supports only a few formats. Even it does not support JPEG2000. There may be no hope.
However, Dropbox and Google started supporting HEIF. Supporting HEIF is becoming a trend in the industry.
JPEG standard was made in 1992. It already passed more than 25 years.
JPEG - Wikipedia
https://en.wikipedia.org/wiki/JPEG
It is a great thing that JPEG is the image standard format for a long years, but when will we stop using this old format? I would like to use more efficient format and save my storage as soon as possible.
Camera manufacturers response
Basically, digital still cameras support only RAW and JPEG. There is no possibility to support HEIF.
According to the following article, the reason why the digital still cameras do not support JPEG200 is cost of IC. However, Apple's A series chip has a hardware encoder/decoder for HEIF on A10 or newer chips.
Reason why there is no JPEG 2000 compatible camera
https://translate.google.com/translate?hl=en&sl=auto&tl=en&u=https%3A%2F%2Fnews.mynavi.jp%2Farticle%2Fjpeg-5%2F
Lightroom CC iOS supports HEIF
[Oct. 31 2017 added]
Updated Lightroom CC supports importing HEIF file. Export is JPEF. Other Lightroom softwares do not support HEIF.
The bottom line is that Lightroom can read HEIF files on iOS device storage. We cannot convert RAW files to HEIF images to save storage. It's too bad.