NVIDIA (NASDAQ: NVDA) is still the most important stock after two-plus years of dominating the stock market. Its GPU technology unlocked the door to AI, and now NVIDIA is capitalizing on it using a full-stack method.

Investors are always scanning the horizon for the next big thing in stocks. For the past few years, it's clear that Nvidia (NASDAQ: NVDA) has been the key winner that's driven most index (and portfolio) returns.

Here's what to expect from the stock market, along with some of Wall Street's hottest trends and most influential businesses, in the new year.