On official forum no info about new SXTsq 5 ac and LHG 5 ac.
A lot of eshops have more than a week information on the web...
The SXTsq 5 ac is a compact and lightweight outdoor 5Ghz 802.11ac wireless device with an integrated antenna, perfect for point-to-point links or as a CPE unit. The device includes one 10/100/1000 Mbit Ethernet port to fully utilize speeds that 802.11ac protocol provides.
The LHG 5 ac is a compact and light 5GHz 802.11ac wireless device with an integrated dual polarization 24.5 dBi grid antenna at a revolutionary price. It is perfect for point to point links or for use as a CPE at longer distances and supports Nv2 TDMA protocol. The device includes one 10/100/1000 Mbit Ethernet port
CPU: IPQ-4018, 4 cores , nominal frequency 716 MHz
Wave-2 802.11ac
Product code:
RBLHGG-5acD
and
RBSXTsqG-5acD
https://www.mikrotik.com/download/share/LHG5ac.pdf