CKEM is promising, as has been something called HATM, HVM or similar back around 1980. That technology is apparently a bit like fusion power and battlefield lasers - always a fixed amount of time away.
Javelin has many issues, as does the conceptionally similar Spike. There are many opportunities for effective countermeasures that could be fitted to legacy tanks. Both systems might end up being obsolete by the time they see a major modern conflict.
Even vulnerability to these weapons/munitions doesn't change much. A well-used tank force spends little time fighting against battle-ready opponents and much time exploiting.
edit: HVM. Proof-of-concept missile flew in 1983.
http://www.designation-systems.net/dusrm/app4/hvm.html
The proof-of-concept development phase of HVM culminated in a fully successful guided test flight in March 1983. In October 1984, the USAF, U.S. Army and U.S. Marine Corps agreed to jointly develop the HVM into an operational weapon, which would include a surface-launched variant.
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