On a high level, Wi-Fi 8 (802.11bn) resembles Wi-Fi 7 (802.11be): it uses 2, 4, 5, and 6GHz bands, the same modulation (4096 QAM), eight spatial streams, MU-MIMO, multiple OFDMA, and a maximum channel bandwidth of 320MHz.
However, according to the MediaTek paper, the new spec introduces several key features designed to improve real-world performance and connection speeds: Coordinated Spatial Reuse (Co-SR), Coordinated Beamforming (Co-BF), Dynamic Sub-Channel Operation (DSO), and enhanced Modulation Coding Scheme (MCS). Remember that we are talking about the standard as MediaTek sees it. Some features could be mandatory, while others could end up being optional.