NVIDIA is teasing something brand new for April 29... and we have no idea what it is. All NVIDIA is saying is that "it's coming" with a date of 29th April.  

What could it be? A new SHIELD? Shield VR headset? TITAN Xv (Volta GPU)? Consumer HBM2-based GeForce card (I don't think so). The GTX 1180/2080 refresh? Hmmm.   

http://www.tweaktown.com/news/57110/nvidia-teases-its-coming-april-29/index.html

The all new Nvidia Shield Tablet with a dock and detachable controllers.

They already shoved out the 1080ti and Titan XP. I can easily see it being a new Shield as well as more talk on their game streaming service.

Looks like something to do with nVidia's Shield in my opinion.
The Polygonal "earth" thingy in the teaser is a hint towards the aesthetics of the nVidia Shield controller.

I think it definitely has something to do with the Nvidia shield, going by the picture. God, that would suck for Nintendo if Nvidia gets out a Nvidia Shield 2, with a portable mode, for $199.

Would be hilarious if they announced another Titan during the press conf.

But yea, probably another shield that hardly anyone will buy due it a lack of care worthy games. At least we get to see a potential switch revision/switch2

Sorry to be a party pooper, but it's nothing to do with hardware or anything like that. It's for some kind of event in south Europe (Italy and Spain are included, but I don't know how many other countries are, if any) in partnreship with ASUS.

http://www.guru3d.com/news-story/nvidia-is-teasing-something-to-be-released-29-04-1.html

God, that thing looks like the most uncomfortable controller known to man.

We are creating something that people will hod tightly in their hands for hours? I know, lets put loads of sharp edges on it! It'll be so cool guys!

They could name the next one Titan Vista

I think Tegra X3.