Although Chiphell is a known rumour source, the latest rumour is an interesting one. According to the leaked slide from them, Tegra 4 will have as much as six times Shader cores than Tegra 3 had. The product under codename Wayne supposedly have 72 Shader processors.
We already know Tegra 4 will be 4+1 CPU design manufactured on a 28nm HPL process, however we didn't have any info on graphics power. Not only it has 72 Shader processors, it will apparently be capable of outputting 1080p @120Hz with full hardware encode/decode for video up to 2560×1440 (1440p) and a maximum output resolution of 3820×2160 (4K).