Real talk: the majority still has 1080p TVs.
With that in mind, what difference will 11.3 vs 12.7 TF make for them (even if it's supersampled)? It reminds me of RDR2 native 4K vs sub-4K. It's a moot point for 1080p (not 4K) users.
Hell, I'd even argue Lockhart will look just fine on a 1080p screen, it will run almost every game at 60 fps (assuming games will be patched for unlocked framerates) and it will also be $200 cheaper (huge differentiator).
The CPU baseline will be far higher this time around and that's what matters when it comes to framerates (GPU resolution can be adjusted, just like PS4 Pro does with the 1080p/SSAA toggle). SSD will also help a lot. GPU will probably be the least important factor for 9th gen consoles (unless we see some sort of disruptive tech like neural networks/deep learning for AI or blockchain/cryptomining stuff etc.).
Unless of course DF decides to throw fuel at the fire and incite a Pro-Sony system war rhetoric (zooming 400-800% on a native 4K screen to examine pixel differences), which is highly unlikely on Richard Leadbetter's watch, lol.
What MS needs is to heavily promote Game Pass (they're already doing that, but I think they will also need help from retailers to increase awareness) and have a steady output of (MS) AAA exclusives (Halo Infinite/Gears 5 seem promising and they have a total of 14 games to showcase at E3 2019).
With cross-play MP (and potentially cross friend lists/party chat) being an industry standard next-gen (courtesy of Azure and co.), many people will be far less likely to buy a PS5. Buying a PS4 for MP games makes sense, because very few current-gen games support cross-play (Rocket League/Fortnite basically, Apex Legends still doesn't have it). If you take a look at Battlefield player pool numbers, then you'll see what I'm talking about (many XBOX playlists are empty vs PS4 playlists).
The killer blow move will be if they decide to ditch the XBL Gold online paywall (imagine if they had done this back in 2013), especially if Game Pass (Ultimate) gains significant traction. Let's just say that this will make Sony (and maybe Nintendo) feel a little bit... uncomfortable about their business strategies.