James Clarke from the Windows team rolled into a meeting today with two Surfaces...but one had no keyboard. Then, without any ceremony, he proceeded to do this:

Now, I consider myself a bit of a Windows Productivity Tips Gourmand, and while I was aware of Miracast and the general idea of a Wireless Display, I didn't realize that it worked this well and that it was built into Windows 10.

In fact, I'm literally sitting here in a hotel with a separate USB3 LCD display panel to use as a second monitor. I've also used Duet Display and used my iPad Pro as a second monitor.

I usually travel with a main laptop and a backup laptop anyway. Why do I lug this extra LCD around? Madness. I had this functionality all the time, built in.

Use your second laptop as a second monitor

On the machine you want to use as a second monitor, head over to Settings | System | Projecting to this PC and set it up as you like, considering convenience vs. security.

Then, from your main machine - the one you are projecting from - just hit Windows Key+P, like you were projecting to a projector or second display. At the bottom, hit Connect to a Wireless Display.

Then wait a bit as it scans around for your PC. You can extend or duplicate...just like another monitor...

...because Windows thinks it IS another monitor.

You can also do this with Miracast TVs like my LG, or your Roku or sometimes Amazon Fires, or you can get a Microsoft Wireless Display Adapter and HDMI to any monitor - even ones at hotels!

NOTE: It's not super fast. It's sometimes pixelly and sometimes slow, depending on what's going on around you. But I just moved Chrome over onto my other machine and watched a YouTube video, just fine. I wouldn't play a game on it, but browsing, dev, typing, coding, works just fine!

Get ready for this. You can ALSO use the second machine as a second collaboration point! That means that someone else could PAIR with you and also type and move their mouse. THIS makes pair programming VERY interesting.

Here's a video of it in action:

Literally just learned from @Clarkezone that I could use an extra laptop AS AN EXTENDED MONITOR. Built into Windows 10! pic.twitter.com/5djg4eCYja — Scott Hanselman (@shanselman) October 18, 2017

Give it a try and let me know how it goes. I used two Surfaces, but I also have extended my display to a 3 year old Lenovo without issues.

Sponsor: GdPicture.NET is an all-in-one SDK for WinForms, WPF, and Web development. It supports 100+ formats, including PDF and Office Open XML. Create powerful document imaging, image processing, and document management apps!