Iran has a new ballistic missile, the EMAD, and it appears that it will deploy a maneuverable reentry vehicle (MARV), which could potentially result in much higher accuracy and the possible ability to evade defenses:

Iran has successfully test fired a new, domestically produced, medium range ballistic missile, named Emad (pillar, in Farsi). “This is Iran’s first medium range missile that can be guided and controlled until hitting the target,” Iran’s Defense Minister Hossein Dehghan was quoted as saying. According to analyst estimates the new missile could be ready for service next year.

The Islamic Republic of Iran already has surface-to-surface missiles with ranges of up to 2,000 kilometers that can hit Israel and US military bases in the region. The new missile seems to be a derivative of these liquid-propelled Ghadr and Shahab missiles. This Medium-Range Ballistic Missile (MRBM) is also powered by liquid-fuel and; according to unconfirmed sources, it has a range of up to 1,700 km., (1,060 miles) carrying a payload of 750 kg (1,650 pounds). Its accuracy is estimated at 500 meters (1,650 ft), compared of 2,000 meters (1.2 miles) accuracy achieved by the current Shahab 3 missile.

Given that this saw deployment with the US in the late 1970s, and is currently being deployed by India, this is not, as this article implies, some sort of exotic super technology.

Instead, it is a rather mature technology, and as such, is doubtless accounted for in the software of most ABM systems.

One thing that I did notice, at least compared to the Pershing II and Agni II is that the control surfaces are much smaller, which would imply that it would produce smaller deviations from a ballistic flight path.

I think that this implies that its primary function is to increase accuracy of the missile, and not to evade interceptors like THAAD and Arrow, as terminal guidance would necessarily involve less control authority.

Given the range, 1700 km, the top speed would be in the 3.5 km/s range, which means that temperature of the nose cone might be low enough to allow for a terminal radar to improve accuracy, much as the Pershing II did.  (Wiki lists the Pershing II CEP of 30m)

If the CEP could be kept to under 100m, this would greatly increase its utility when carrying a conventional warhead.