Is Redis just a cache?

Like a cache Redis offers:

• in memory key-value storage

But unlike a cash Redis:

• Supports multiple datatypes (strings, hashes, lists, sets, sorted sets, bitmaps, and hyperloglogs)
• It provides an ability to store cache data into physical storage (if needed).
• Supports pub-sub model
• Redis cache provides replication for high availability (master/slave)
• Supports ultra-fast lua-scripts. Its execution time equals to C commands execution.
• Can be shared across multiple instances of the application (instead of in-memory cache for each app instance)