Well...according to Northrop Grumman, the company has already. delivered the first set of AESA radars to Taiwan in Jan. 2015. Therefore I assume that a significant number of Taiwan's 144 F-16s will be equipped with AESA by mid. 2016.
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Ultimately if an air war break out over the Taiwan straight (say DPP government declares
de jure independence after winning the 2016 election), the ROCAF will lose most of its planes. However, AESA-armed F-16s could buy more time for U.S. forces to come to Taipei's aid and inflict more costs on PLAAF (quality of quantity here). Also, I doubted that the PLAAF will have more than 100 AESA-armed J-10B/J-16 in battle-ready condition by mid. 2016. If Beijing's current investment in the PLA modernization does not slow down, the most ideal time for invading Taiwan would be waiting until the PLAAF possesses 2-3 batches of J-20 (equipped with WS-15 engines) and around 200-300 AESA-armed J-10B/C operating along-side J-11s, J-16s, and AWACS. Finally the PLAN needs at least two fully operation carrier battle groups if it were to neutralize Taiwanese forces in Eastern Taiwan before U.S. assistance arrives. Basically if Beijing were to militarily neutralize Taiwan's defense, it needs to have its own Air-Sea battle concept. 2016 (and even 2020) would be too early. Also, who knows if the next U.S. President (maybe a Neocon hawk) will sell the F-35s to Taiwan.