Naughty Dog is seen as the better dev overall. Many people don't seem to care about halo as much as they used to. While I don't think hype for UC4 will be as big as the last two games, I still think it will get a decent amount. If those two games are the highlights though, I'd say both conferences will be a let down though.

It would be too early to show anything from halo 5. This year will be about the halo collection/halo 2 remake.

right now, i think halo is bigger than uncharted by around 25-30% WW. e.g around 10m vs 7m as a franchise.
So U4 still needs some more work to beat Halo 5 in terms of popularity. critical acclaim is a different discussion altogether and it doesn't always translate to sales. =P

So depending on how it looks and plays, U4 might have a shot at canceling out H5