Why wouldn't we? Sony hasn't exactly pushed second screen support outside of Vita remote play. The performance of Smartglass compared to PSVita remote play would show the benefits of Wifi Direct if performance is much better. I mentioned how Project Spark would be a good indication of this since it's working as a controller and video screen for that game I believe. That's my point. Is that clearer?
1. RemotePlay is a second screen feature and Sony making it a system level feature rather than developer choice and making developers provide Vita control scheme is pushing second screen.
2. Creating PlayStation App which allows you to browse PSN, download games to PS4, View PSN profile, Watch live streaming videos, Messege friends is also supporting second screen.
Correct me if I'm wrong but isn't Bluetooth latency 200ms? That's what you should be comparing it to, not Wifi vs Wifi.
Remoteplay does not work over bluetooth, it works over Wifi.
People keep going on about Wifi direct when they clearly do not know what it is, it is a software stack in the Wifi standard supported in every certified 802.11n standard. It allows 2 devices to connect with each other without the need for access points (router). It allows for simultaneous connection between 2+ devices while also maintaining an internet connection which cannot be done in adhoc mode. PS4 to Vita remoteplay is via Wifi direct according to Mark Cerny at E3 Latin conference and can also work via router over the internet/local network akin to how remoteplay on PS3 works via adhoc direct connection between PS3 and PSP/PS Vita and over the internet.
Can anyone clarify on whether or not PS4 will be incorporating the blutooth 4.0 update? Also curious about that Wifi-direct response time, it sounds pretty nice actually. (not that I've had any issue playing PS3 games, and won't really matter because we'll only be playing against other PS4 players).
No PS4 does not support BT4.0. BT4.0 data rate is much lower than BT2.1EDR for devices using BLE profile, lower latency but If BLE is not used, throughput is 24Mb/s for Bluetooth 3.0+ via a 802.11 wifi link but higher latency compared to latency of bluetooth 2.1EDR.