As of now there are no longer any technological constraints preventing the 2029 or 2035 parade be made up of humanoid combat droids formations followed by large walking battle mechs and PLA troops in power armor, of course in practice we're more likely to see quadrupeds, maybe large hybrid electric ones with cannons, which would still be cool.
Personally I think the first true power armour deployment in the real world will be in the form of power armoured troops riding quadruped mounts.
Currently the key limiting factor for true power armour is in making a power source compact enough. The mount side steps that issue by allowing you to use the mount to carry the primary power source, with the power armour itself only needing a secondary power source that only needs to last for a few hours instead of days or weeks.
The mounts also solves the speed problem with power armour, as slow prodding suits will get absolutely obliterated by ATGMs and FPVs.
But sadly, in the world of FPVs, power armour might become obsolete before its even developed, as no level of protecting such power could realistically provide would be enough to protect against FPVs with shaped charge warheads.