"shall not be abridged" is rhetorically powerful, but will almost certainly never be the law again.
It never was the law to the best of my knowledge. Restrictions go back to the late 18th century.
No right is entirely unfettered. We have time, place, and manner restrictions on speech, and it's likely that those limits will also apply to the exercise of the 2nd Amendment in even the best scenario.
We've got a lot of restrictions on the RKBA, and rollling them back is an uphill battle that'll be won by degrees.