I have noticed a big trend for sea-themed & beach-themed stamp & die sets - mermaids & mermans, fish, crabs, starfish, octopus, shark, narwhals, beachy-type images, palm trees, boats - all types of sea creatures and sea plants. There are even some fish layering sets. Saw a set recently with seagulls which is just so adorable!
Zig clean color real brush markers - and many people discovered that they work best of Strathmore Bristol smooth white cardstock because they blend more easily then on regular watercolor paper.
Lots of interactive cards - and dies to help you make them eg: magic sliders & discs that go in them, other slider dies, spinner circle dies, lift the flap dies etc. Shaker cards and Chibitronics (little circuits you attach to your card with batteries and a light(s) so that you can add a fun light-up element to your card.
Even more stitched dies - anything from clouds to ocean waves to flowers to your basic shapes with inside & outside stitching.
Foiling
Galaxy backgrounds
Vellum - sent lot of cards with vellum and in particular, sentiments stamped on vellum.
White heat-embossed sentiments. In the past, I have mostly stamped sentiments in black but I have seen so many white heat-embossed sentiments recently and I just love how it looks
Even more cute critters: foxes, bunnies, unicorns, cats & dogs and lots of African animals, eg: giraffe, elephant, monkeys, alligators, lions, sloth, leopards, toucans.
Popsicle, icecream in a cone stamps and layering sets
Even more variety in large sentiment dies - some with several layers and some with matching stamps as well.
So much been happening and so much fun to see what a fantastic variety of things we can choose from