Not so fast. For a start developing these unarmored exoskeletons into powered armor will still take some time, probably several years. Then even once that happens you will not be able to turn everyone into the Mobile Infantry. Money issue aside it seems to me that a soldier fitted with such thing will not have the same set of abilities that a regular infantryman has. He will be much better protected and equipped. But he will be also bulkier and much heavier. This means he may not be able to go in the same places a normal soldier, even with body armor, can go. He will be also more resource intensive to keep in the field, meaning a further increase in the tail to teeth ratio, which may not be desiderable in some scenarios.
I could see some units being equipped with that, but not something everyone can be issued with like a bulletproof vest.