Well, speed is good. I had 2 Nexus 10 tablets, purchased when they first came out. Nothing since then has come close to those specs, overall. Speed and resolution, mostly.
As part of my job, we have many tablets. Before anyone mentions ithings, the ipads just set in a drawer, because they are a hindrance, rather than an aid.
In general, technology seems to be going backward. Things are getting less powerful, slower, less reliable, and more difficult to use. When I "upgrade", I usually am forced to choose what I want to give up.
For phones, I am not impressed. Signal is less reliable, call quality has fallen, and the app is clearly an app. Someone will surely contradict this, but I guess it's about expectations. I expect to have the same quality I used to have, or better. We recently had to go to VoIP. I'd say the call quality, compared to our PRI is about 50%, and the reliability about 30% of what we had. Since the phone system remained the same, and only the external stuff changed, I have to blame the VoIP itself.
Part of the problem is the change to a digital signal. Sprint always advertised it as crystal clear. This was back in the '90's. I thought their signal was terrible, and stuck with analog. Digital gives you all or nothing, where analog gives you something. Unfortunately, there was so much noise on the digital, that they had to either clean up the signal, or drop more of the signal with error correction filters. Unfortunately, they chose the latter option. Now, the signal is broadcast as UDP, so correcting errors is difficult. That is why pieces of voice come through out of order, resulting in scrambled voice. Now, were it transmitted as a stateful connection, there would be error correction, lost packet re-transmisdion, and all the packets would be put back in order. Again, this would require that they clean up their signal. Instead, the carriers keep building new towers that digitally isolate individual signals on overlapping frequencies. Part of this is that commercial and private frequencies are being reduced, because the government is reclaiming channels to reduce noise on their networks. As wireless traffic increases, there aren't enough frequencies, so each caller is digitally "isolated", only not as much as you would like. There is a lot of bleed-over. So, you can hear parts of other people's conversations. Anyone that wants to hear your conversation or clone your phone can easily do so. The supposed "encryption" of your signal is laughable. Remember, these are stateless connections. Encryption is stateful. So, the phone "encryption" is less secure than WEP. Basically, listen for the key. No pair. That is how your phone is cloned. When listening, a good packet capture will bypass the "encryption", merely by choosing cellular.
Long rant. Someone with more knowledge of cell towers can probably explain this better.