There's no evidence of a price hike. The only (coherent) claim in this rumour is that the 14" M1X MBP will replace the $1800 Intel MBP 13 rather than the low-end $1300 M1 MBP, which has been pretty obvious since last November.I like the Mx performance, but the rest of the machine really needs to keep up to justify this price hike.
The big doubt about the M1X is whether it can match the top end 16" MBP and 5k iMac configurations with 5GHz i9s and upgraded CPUs. It's really not hard to believe that it can thrash the Intel 13" MBP with its low-power i7 and Intel integrated graphics - the M1 already challenges that on performance, so all it has to do there is support 32GB RAM and a second external display.