There has been so much negative feedback with "IPS backlight bleed" (which isn't actually even tied to the IPS technology itself, btw), so now that AUO has started manufacturing their 144Hz AMVA3 panels in full scale, the monitor manufacturers are eager to take them.
But, a little bit of statistics (the 2016 figures are naturally only Jan-Oct):
2015 new monitors in total: 268 IPS, 156 TN, 59 VA
2016 new monitors in total: 178 IPS, 116 TN, 57 VA
2015 curved monitors: 10 IPS, 17 VA
2016 curved monitors: 10 IPS, 20 VA
2015 100Hz+ monitors: 8 IPS, 13 TN, 8 VA
2016 100Hz+ monitors: 4 IPS, 17 TN, 12 VA
2015 G-Sync monitors: 8 IPS, 3 TN, 1 VA
2016 G-Sync monitors: 3 IPS, 5 TN, 6 VA
2015 FreeSync monitors: 13 IPS, 15 TN, 2 VA
2016 FreeSync monitors: 32 IPS, 17 TN, 13 VA
Interesting small tidbits:
- TN is apparently not suitable for curved monitors at all
- every third new VA monitor is curved
- every fifth new VA is 100Hz+
- every fourth new VA is FreeSync compatible
- FreeSync seems to have gained ground quite rapidly (every sixth new monitor supports FreeSync)
Final conclusion: Yes, VA is indeed catching up, relatively speaking. But its rise is mostly seen in the "special features" market.
Disclaimer: These are just hasty calculations from a price aggregation site. (AHVA are included in the IPS sections)