Google I/O: Google-made ChromeBook, updated Nexii?

So first there was:

http://www.tomshardware.com/news/Nexus-Chromebook-Conmpal-Wintek-Chrome-OS,19297.html

Then:

http://www.phonearena.com/news/LG-Nexus-5-and-Nexus-7.7-rumors-commence-higher-resolution-screens-Google-IO-announcement_id38784

And the N10:

http://news.yahoo.com/google-may-upgrade-nexus-10-quad-core-cpu-214128876.html

I realize there's been tons of speculation, but do you really think Google is saving all of this for I/O?