More and more people are using smartphones thanks to budget friendly mid-rangers, almost anyone can now afford to buy a smartphone.
Mobile payment is becoming more common and it is an opportunity to acquaint people more into using bitcoin . Mobile payment will eventually replace credit cards or at least will make them less mainstream. An example of this is Apple Pay. Bitcoin smartphone wallet apps are to use when you have a transaction, you just scan a qr code and the transaction is done though will take some time to be confirmed.
Agreed, that is definitely the future. But the point of slow transaction is also valid, bitcoin has to come up with something better to cope with it so it can be more popularized in the general people and business world.
I this this could be the only or the biggest hurdle standing in bitcoin's way for now.
Transaction is not slow as long as we pay the right amount per bytes, I never have problem with transaction after I learned about transaction fees, mostly they confirmed within 10 minutes range. I had learned my lesson from my experience, sending low fees will definitely make you wait for a very long time.
Indeed with smartphones we can transact Bitcoin anywhere we want. We can even send funds even when we are out with friends. As long as internet is available, smartphones can do alot of things for us, specially in Bitcoin transfers.