Will we see a F-35 equivalent of future tank development? Something smarter, more networked but also more individual in its mission undertaking.
If you are looking for that one tank too rule them all You are not going too find it. ( although the case could be made that the Leopard2 is prety much Planet Earths offical main battle tank, If you make the Kalashnikov Earths offical assault rifle and browning the most common pistol)
That said I think You will find what you could call a standard For new top of the line main battle tanks. that is features that seem too be becoming more and more present and rampant these include a modern auto loader for the main gun ( regardless of caliber), remote weapon stations, Soft and hard kill active protection systems, adjustable suspensions and modular armor packs. all or most of these features are seen in the French Leclerc, Korean K2 black panther, The new Turkish Altay, Japans Type 10, the polish WPB Anders, the Croatian M-95 Degman ( based on the same T72 platform as the Russian T90 series) The latest Merkava and the Chinese Own Type 99KM. The Russian "Universal Combat Platform T-99 Armada" Is expected too have much of this as well If the hype is correct ( rumors have it the Object 195 prototype did too.).
The Driving force being the fact as proven by Realities faced in combat by Russians, The US, and the Israelis.
Tanks are not just facing off against tanks in fact more often the enemy's have no tanks at all. What they do have is cheaper and cheaper more effective antitank weapons, more and more light machine guns and bigger and bigger bombs. These combined with simple old school antitank berms and tank traps in Urban terrain force tank is to more and more likely points of ambush.
In order too prevent such as well as improve safety and protection reduction in crews, use of MG's well under armor and anti anti tank systems are moving too the norm. The Chinese Recognized this hence the KM modifications integration of active defense system. Moving this farther would be a remote commanders MG ( There is too my knowledge no indications of such.
YET) Although the 155 mm gun is nice against armor A huge caliber like that would offer lots of HE in it's shell for anti infantry.