If there is anything interesting to announce, those announcements will most likely happen at the MUM EUROPE event in April 5, 2018 (see banner on top of page)
OK, may be you can answer in common words about my question? At lease should I buy RB1100AHx4 now or there would be something more interesting released? )
You should wait a bit because it seems like there will be rbd52g with more ports. It could be useful for you. On the other hand, there can be many months between the announcements and real deliveries…