The PS5 will have HDMI 2.1, more than adequate for 4K @ 120Hz, so the bandwidth will be there.
1440p/144Hz, it's going to be in the implementation.
Using HDMI 2.0 (or older) is still going to have the same limitations in terms of colour or max refresh rate.
I'm not sure if it's going to be possible to 'adapt' from HDMI 2.1 to DisplayPort via use of adapters though.
It's probably a little early to be purchasing a monitor to pair with a PS5, given we're 6+ months out from launch though.... Probably better off waiting until the picture is clearer.
That depends.
If the monitor supports 1440p/144Hz over HDMI (meaning a 2.0 implementation at minimum), then you should be fine, although may make some colour tradeoffs to get the 144HZ. 2.0 only has the bandwitch for ~100Hz @ 1440p, IIRC, without sacrifice.
If the monitor required DisplayPort, I'd suspect "active" HDMI 2.1 to DisplayPort adapters exist, or will.... but I'm not sure.
My aoc cq32g1 has displayport and HDMI 2.0. I also found displayport to HDMI converters. You think that will work?
Depends on the specific adapter.
Remember, you'd be converting HDMI to DisplayPort. They're usually unidirectional.