Lol, it is possible and likely for Gears to outsell Uncharted 4 in the USA. But, have in mind that Uncharted 4 wasn't  bundled and did not had a holidays sales. Halo is supposed  to have sold over 5 millions of units worldwide. Uncharted 4 nearly crossed 1 million at retail in the month of launch, probably surpassed 1 million with digital. Do you expect gears to sell 6+ millions, if Uncharted 4 only sells 2 millions despite being  bundled, only on the USA ?

At $279 currently the UC4 LE bundle is the most interesting PS4 bundle IMO. If I had to buy a PS4 console now I'd buy this one. It's a good collector bundle that will have an interesting reselling value.

At $288 the PS4 fool's edition should be renamed 'incredibly fool's edition'

It's better than a few weeks ago when it was priced at $319 and still in the top 100, despite the Black Ops 3 and UC4 bundles being $279. Guess people really wanted that plain blue box :)

4 hours since last update:

HARDWARE

#34 PS4 Pro (down 1)*
#39 PS4s UC4 Bundle (down 1)
#40 XB1s 2TB Gears Bundle (down 1)
#53 PS4 Fool's Edition (up 1)
#75 N3DSXL Galaxy (down 1)
#78 PS4 LE UC4 Bundle (up 9)
#94 XB1s 2TB Launch Bundle (up 4)
#99 XB1s 1TB Madden Bundle (down 2)

Does not affect this month (*)

There is a fierce battle between the PS4 slim and the Xbox One slim.

I think Gears of War launch month should be super close to Uncharted 4. Uncharted 4 sold 879,000 unit first month including bundle, i expect 900k-1m for Gears, so more than Uncharted but not much more. Problem is that i really don't see a Gears bundle which can outsell the Uncharted 4 bundle this holidays, so overall lifetime Uncharted 4 should beat Gears even in USA... or to be shorter in the question if Gears can outsell Uncharted 4:

Unlikely

Huh, either the hourlies haven't been updated in 3 hours or everything hasn't moved at all.

That would be a mighty drop, since Gears 3 did over 2 million, but I'm right there with you, I expect it to edge Uncharted but not by a collosal amount. I do think the One will take the month, as the Pro is really eating more into ps4 sales than I previously expected. Sony probably should have released it in October, but ah well, it will do fine either way. 

EDIT: Good lord, looking back at the old NPD charts to get the Gears 3 number is pretty eye opening, 360 did over 400k that September (2011) and PS3 was right behind it. I bet either company would kill for those numbers this NPD. 

5 hours since last update:

HARDWARE

#32 PS4 Pro (up 2)*
#37 PS4s UC4 Bundle (up 2)
#38 XB1s 2TB Gears Bundle (up 3)
#53 PS4 Fool's Edition (-)
#69 N3DSXL Galaxy (up 6)
#78 PS4 LE UC4 Bundle (-)
#90 XB1s 1TB Madden Bundle (up 9)
#97 XB1s 2TB Launch Bundle (down 3)

Does not affect this month (*)