The good news is, Cycles 4D is now available to buy. We have no immediate plans to alter the pricing structure, X-Particles 3.5 Users need to enter a discount code of 'xp15' and the X-Particles serial number at checkout to receive the 15 % discount off Cycles 4D. Another positive, Cycles tutorials are relevant to Cycles 4D Users, we also have a video library of our own - mike has created some great tutorials for Cycles 4D. When the Blender Foundation release updates, these will be implemented into Cycles 4D but not instantly, the team will need time to implement any changes. Take a look at this article http://insydium.uk/cycles-4d-release-date-15th-november/ it goes into details about benefits, FAQ's Pricing etc. And finally yes a demo will be available, we are just working on it at the moment, I understand the need to try before you buy. Hope this helps thanks