When comparing Google Glass vs Microsoft HoloLens, the Slant community recommends Microsoft HoloLens for most people. In the question“What are the best smart glasses?” Microsoft HoloLens is ranked 2nd while Google Glass is ranked 4th. The most important reason people chose Microsoft HoloLens is:
This is a current product, and is in active development. Developer devices are shipping now (as of June 2016 they are shipping wave 4). This isn't a past project - it's here and now.
Question Ranking
Pros
Pro Built-in navigation support
Google Glass integrates with Google Maps to provide directions and real-time navigation information.
Pro A wide variety of glass designs available
Glass has multiple colors, frames, shades and earbuds available to help achieve a desired look.
Pro Can record 720p video
Google Glass allows recording a 720p video by either holding down the button that's located on top of the heads up display or saying "Ok Glass, record a video". By default the device will record a 10 second video, but that restriction can be removed by clicking the button again while recording.
Pro Natural language voice commands can be used to interact with the device
To interact with the device say "Ok, Glass" and give it instructions on what to do. Currently, it supports things like taking a picture, getting directions or calling someone, but more functionality will be available as developers start creating apps for the device.
Pro WiFi and Bluetooth connectivity
Pro Active development
This is a current product, and is in active development. Developer devices are shipping now (as of June 2016 they are shipping wave 4). This isn't a past project - it's here and now.
Pro Stand-alone device
The HoloLens is a completely stand-alone device. You can use it without a PC or phone, and there are no external wires meaning you have completely unrestricted movement.
Pro Recognizes speech, gestures and eye movement
Pro Comfortable to wear
Instead of putting all the weight around one ear, the HoloLens balances the weight out around your entire head with its full band. The tightness can be adjusted to make sure the best fit is attained, and the front visor tilts up and down so it can be used in even more ways.
Cons
Con Project put in limbo
While Google has said they haven't scrapped Project Glass, they aren't actively developing it at the moment. For all intents and purposes, Google Glass is in limbo.
Con Weighs more than many other headsets
Although comfortable on the head, the HoloLens weighs 1.5 lbs as compared to Google Glass, Vuzix, Epson Moverio, etc. which weigh in between 1.5 and 3 oz. Even if the HoloLens battery lasted longer than 2-3 hours, it would be difficult to imagine wearing the HoloLens for an entire day of work.
Con Developers only right now
To order the HoloLens, you need to be a developer in USA or Canada, and also a Windows Insider. Regular people can't order this yet - even if they had the $3000 required.
Con Limited use-case scenarios
While not specifically marketed for industry, it looks like HoloLens will be most useful to businesses as opposed to consumers. This is a full fledged headset, not a small screen in the corner of your vision.