STRATEGIC CLARITY!!! I am waiting to see White House's press conference tomorrow.
If the White House spokesperson confirms Biden's speech today, Beijing would either have to wait another decade (assuming no lasting economic downturns) to invade Taiwan (so, a temporary strategy retreat), simply change its Taiwan policy toward more flexible interpretations of sovereignty/autonomy, or strike US bases in the Pacific (along with those in Japan) before the U.S. military deploys hypersonic weapons. If Beijing were to choose the last option, it could mean striking U.S. bases en masse with little warning (Pearl Harbour on steroid), which would risk triggering a tactical nuclear response from INDO PACOM.
For Washington, if Biden (or next President) does no act on this new commitment, it would be the end of the U.S.-led order in the Indo-Pacific. However, if he (or she) were to act, the risk of nuclear war would be tremendous.