The convertible is now shipping through Best Buy for a starting price of just $500 USD. Options for 4G LTE, however, will have to wait until May. The new chassis is nearly identical to last year's model with a few noteworthy changes.
https://www.notebookcheck.net/4G-LTE-on-a-budget-2020-HP-Pavilion-x360-14-will-have-WAN-options-for-the-first-time-in-the-series.461915.0.html