4 GB are not necessarily too little nowadays, but one should expect to be careful with the programs he runs. Like Android phones with half a GB of RAM.
BTW, how are they going to deal with https? Are they going to block the IPs of the ad networks?
When I'm ssh-ing to a server I can usually tell the difference between WiFi or Ethernet. It seems that WiFi isn't good at sending many small packets (one per keypress) quickly in a crowded environment. At home I always connect my laptop to Ethernet unless I'm using it on the coach.
I always plug my laptop to the main and I use a USB drive once a day to back it up. Luckily it's got 3 USB ports and a separate DC port. I won't have any problem doing a backup on battery power but it's not likely that I'm doing it on a train
If you really can't do that, use a local password manager like KeepassX on your phone and copy the password by hand on the computer. You compromised only that site. However this can be extremely painful if you use fully random password like g27rkuqhLJcM46G9YsxV4rlF9ACtveB1. These are 32 characters with only letters and digits to limit the typing errors (think about entering punctuation on a very foreign keyboard layout). According to KeepassX its strenght is 191 "quality bits" defined as the "equivalent size of a random symmetric key."
If you use an Internet password manager on an untrusted machine you run into the problem you described and all your accounts are compromised.
By the way, assuming that passwords are stored as SHA-2 (64 characters) should we use 64 characters passwords to minimize the risk of collisions?
I use Opera on my Android devices because Firefox still has problems rendering some sites. It's part fault of those sites and part fault of bad decisions on the side of Mozilla. Go try reading the comments thread on Hacker News and you'll see (pick one with many nested comments.) Slashdot used to suffer from the same problem.
A bad handling of text inflation could have lost mobile to Mozilla, and maybe all the company. Some sites must work well because the people there are the ones that tell other people which tools are cool and which are uncool.
Another SG2 here. I love the SD card, the plastic body, the replaceable battery. Plastic and the replaceable battery help the phone surviving drops because they discharge the kinetic energy (google bent corner iphone or mac). Because of that I won't buy the SG6 when my SG2 dies but hopefully that will happen many years in the future so Samsung have plenty of time to rethink their design.
Other things that I love: the relatively small size, which let me fit it inside my front pockets if I have to, the light weight (but now only 20 g less than the S6, large phones are getting slimmer) and that I can mount it as a disk over USB without going through the MTP madness. A not so nice thing: the SD card is hidden under the battery so I can't eject it without shutting down the phone. This is a bit limiting.