TCAS2 for Light Aircraft
 

With the computer power we have today, in small packages (GPS etc), and ADS-B. How long will it take to get full TCAS2 type collision avoidance technology fitted on all aircraft regardless of the aircraft size.

From Wikipedia

ACAS XA set of new systems called ACAS X[49] will use this new logic:

• ACAS Xa will be a direct replacement for TCAS II, using active surveillance
• ACAS Xo will be collision avoidance tuned to work in some currently difficult operational situations, notably closely spaced parallel approaches.
• ACAS Xu will allow multiple sensor inputs and be optimised for unmanned airborne systems.
• ACAS Xp will be designed for aircraft with only passive surveillance (ADS-B).

The first FAA-scheduled industry meeting was held in October 2011 in Washington DC, to brief avionics manufacturers on the development plans for "ACAS X" – including flight demonstrations scheduled for fiscal 2013. The FAA says its work "will be foundational to the development of minimum operational performance standards" for ACAS X by standards developer RTCA.[50]

It is estimated that, if ACAS X will be further developed and certified, ACAS X will not be commercially available before mid 2020s. And it is said to be unclear at this stage whether ACAS X would provide any horizontal resolutions.[51]