I sincerely hope there was more to this leak than the image in the post, as that was ... unimpressive. Not in what it says, but what it is. Btw, has any Ice Lake G4 SKU (the baseline for that "chart") actually been used in any shipping device? All I've seen is G1 and G7.
Beyond that though, this is nonetheless promising (should it have any truth to it). Nothing in the PC space would make me happier than a truly competitive iGPU market with real generational performance gains.
As noted by several people above, 3DMark is a relatively poor metric when it comes to Intel though. For Nvidia and AMD it roughly approximates relative gaming performance (though per-title variance can differ greatly from this), but in the case of Intel, 3DMark is one of extremely few titles with actually good driver optimizations. This is easily seen in the recurring theme of good 3DMark scores yet terrible in-game performance for Iris Plus iGPUs (with the exception of a few titles, like LoL and CS:GO). The main issue with Intel iGPUs is as such not peak performance, but rather the sorry state of their drivers and software.
All I really want is a thin and light laptop that can reliably play light games (Rocket League is a particular desire) at >60fps at 1080p medium or so, or 120fps at 720p medium. My current i7-8650u can barely maintain 30fps at 720p with everything set to low (at which point the game looks like utter garbage). This really shouldn't be a challenge, and the old Vega 10 comes close, so a good LPDDR4X Vega 8 should do it ... but there aren't any yet.