I bought an HTC Flyer about a year after it came out. I like my HTC phone, I liked the design of the tablet and its enclousure is still one of the best ever built. I mostly wanted to fiddle with it and programm a little for Android.
Turns out that I used it every day, for real work and leisure on the go. Calendar, docs, portable hotspot, reading, watching movies or short videolectures on the go, listening to music, audiobook, taking notes, playing games, etc. I'm since convinced of the feasibility of tablet computing.
I've recently decommisioned the HTC Flyer after more than 3 years of every-day full-scale use and bought myself a 10" Lenovo Yoga 2 Android with LTE module. Awesome device. Good enclosure, 9600milliamp battery, cost less than half of the inferiour iPad Air 2. It runs for 3+ days without charging and I plan to use it as my primary mobile computing device. Will carry my MacBook Air around less because of this I suspect.
As a result I'm using my 4,5 year old HTC Phone even less, which in turn means its battery runs even longer. On top of that, you can use the Yogas battery to charge your phone - that's a feature they (Ashton Kutcher) actually advertised on the Yogas first presentation.
There are pretty decent web IDEs and PHP environments for android out there.
My 2 cents.