I have allready used my phone as a boarding pass. Just scanning barcode which was sent on email :)

Indeed. And airlines easily can/do send emails with new info when something changes. Wasn't there a post a few weeks back about email being all some problems need? Hoping airlines do unnecessary work to make/maintain a plug-in is kind of silly. I'd rather they focus every erg they have on running the planes well/better and just send me an email.

Airlines (you can see United as one of them in the demo) already accept digital passes. The TSA, however, requires a piece of paper so that they can mark it up and send you on your way. You still cannot get around printing a boarding pass quite yet, sadly.

You do not need a paper boarding pass to go through security with TSA. They accept the QR codes via smartphone screens. There are scanners at the point where they mark paper boarding passes.

Needed them in BOS when I flew a few weeks ago. At least there was a sign that said you did--I didn't tempt it by going through with just my phone.

I haven't printed a boarding pass since Delta came out with their app. At least in SLC, you don't need it.

Completely false. I've flown with electronic boarding passes out of ORD, LGA, SFO, and a few other airports on both United and AA. The TSA is 100% fine with mobile boarding passes. Their readers often work better than the airlines', actually.