I received an unexpected Christmas bonus which would have just about stretched to an Oculus Rift but I decided to be more sensible and upgrade my phone (which turned out to be a saving) and spend £62 on the Gear VR.
Apart from Cheapness, the Gear has higher resolution but smaller but still perfectly acceptable viewing angle. The resolution (2k across the whole screen) is only acceptable. It's a bit like watching youtube in 480p on a huge monitor. I think I'd be dissapointed if I spent hundreds on a Rift or Vive for half the resolution.
Head tracking is amazing and yes, there are a few more bits on the Gear which promote it above Cardboard/Plastic Cardboard headsets. It has a trackpad, home, back and volume buttons and more gyros.
The main difference between Gear and the higher end stuff is that there is no room space tracking. You sit still and the device only recognises changes in rotation and elevation - this is probably for the best if you're at all queasy!
There are hacks around to stream content from your PC to a Gear but I haven't explored them yet. I did that with a Plastic Cardboard and a Note 3 with some success (I managed to get Elite Dangerous working quite well) but the resolution was poor and the head tracking drifted so much that it was quite useless after a few minutes. Flying around spacestations and planets was incredible - even if the clarity dropped from Pin sharp 4k on the monitor to murky 1080p on the Note 3.
On the whole, I'd recommend giving this a try. VR generated on your phone is the cheapest way into the field and gives impressive results.
Kim. As for glasses, Gear VR basically says no. You need contacts, unfortunately. The lenses are really close to your face.
Also, there is evidence of greater susceptibility to Motion Sickness in these situations for women
https://www.ncbi.nlm.nih.gov/pubmed/16018346 but I also dimly recall that there are still options out there for addressing this. I think this is the article I was thinking about:
https://qz.com/192874/is-the-oculus-rift-designed-to-be-sexist/