The weight issue is a big one. I can't see the armor, alone, weighing less than 100 pounds, canon. Ceramic Carbide and Titanium Carbide are heavy and expensive, and there's the second issue. It would cost more than a soldier is worth. Even if it was only provided to, say, SEALs teams that ODSTs so seem to parallel, it would cost more than they were willing to spend.
By using lighter, cheaper materials, you still don't cut the cost down enough to justify against the military budget, and you generally lose protection.
That said, the advanced HUD technologies seen in the ODST helmet do have a chance at being future fare. Monitors for vital information, team status, integrated compass, light polarization, GPS location waypoint marker, even predicted shot impact point are possible, to some extent, with current technologies. The main issue with those, again, is cost, and the problem of power consumption. I doubt it will be seen by the midpoint of this century, but may follow shortly after.