i didn't watch nintendo but i thought the best announcements were (in no particular order):
TLG
Horizon
dreams
final fantasy VII remake
uncharted 4
vue supporting ala cart channels
halo
xbox backwards compatibility
recore
cuphead
sony won in volume. sony had the more surprising reveals for sure with FFVII and shenmue and TLG. ...but microsoft did put on a good show. ms's show in any other year could easily have been the best show,.. it's just sony put on the most epic show that has ever happened this year.
i want to also mention,.. sony deserves props for its conspicuous absence. not showing (or i guess dwelling) on project morpheous was a good move. i hope they give it its own show sometime soon but not showing making it a focus of E3 was a good move. gamers want to know the games they are getting for the hardware they already bought at E3. morpheous needs its own reveal show like the ps4 got to focus only on why someone should care about investing in that platform.