Formal:
* Avant-garde: This word implies being at the forefront of artistic or cultural trends.
* Cutting-edge: Refers to something very modern and innovative.
* Futuristic: Suggests a design or style that looks like it belongs in the future.
* High-tech: Emphasizes the use of advanced technology.
* State-of-the-art: Indicates the highest level of current technology or design.
Informal:
* Sleek: Describes something stylish and streamlined.
* Contemporary: Refers to something that is current or in fashion.
* Modernist: Emphasizes a minimalist and functional aesthetic.
* Trendy: Something that is popular or fashionable at the moment.
* Hip: A more casual term for something that is cool and fashionable.
The best word to use will depend on the specific context and the desired tone.