According to writings of Bloomberg, new Apple tablet is already in production. According to the same source the launch of iPad Air 2 is expected some time at the end of September or at the beginning of October this year.
This next version of iPad Air will have anti-reflective screen and the screen size will remain the same. This will make using of a tablet much easier during not so ideal conditions of ambient lightning, but due to certain problems in production the availability of the tablet will be limited at the beginning. Also new iPad should be somewhat thinner then its predecessor, and Apple will finally include finger print scanner called Touch ID.
New generation of iPad Mini with Retina screens also starts production, and the start of sales is expected by the end of the year.