I use surface pros. 3 and 4.
They have replaced my desktops and laptops.
They have more than enough performance with tons to spare for anything construct 2 can produce.
They have astounding but high dpi screens. You can dock them and use like a desktop. Actually you don't even need the dock. Just use with any Bluetooth keyboard and mouse. or u can plug some in.
The tablets themselves have a display port out so you can have very nice dual screen setup where you can instantly test touch. I have the game running on the tab screen with C2 on a 24 in screen plugged into it.
I use live preview over lan for a number of phones and Android tablets... This is fine for checking mobile performance there isn't need to keep making apks)
( have no idea what people are smoking when talking about monthly fees for apk builds)
They also have sd card slot for back up.
You can use them with all your regular windows programs.
Of course the one thing that really sets them apart is the superb stylus and it's uses.
I have rediscovered my love of drawing and painting with these wonderful devices and if pixel art is your thing then you need one now.
Also I have "discovered" that to work out real maths you need to write it down with a pen. Again here the surface pros have been a revrlation
1) the surface pro 4 battery gives u about 5 hours regular non gaming use. Don't take notice of the 9 hour claim on ms site. The sp3 is better at about 8 hours. However the sp4 is thinner which I have found myself liking.
2) once you've worked with microsoft edge ( which is still new and a little buggy) browser you will see what a bloated laggy mess chrome is and never want to touch it again. But it looks like for now Scirra C3 will be on chrome.
Many normal windows programs including c2 are not optimised for touch or stylus.
I'm not sure about developing full time on a tablet or even laptop. To properly work with C2 and mostly likely C3 you need a large screen end of story. however I don't think you can beat the surface pros in the tablet department. And As said previously kick out the stand, plug in a 24 in monitor and you have the best Dev setup you could ask for.
These are not really issues for me but just FYI.
Personally I think these devices with the stylus capabilities should be mandatory for all 2d ga me devs but that's just me.
I picked the i3 pro 3 up for about 300 quid on eBay refurbished with a brand new screen as a test.
Picked up a new i5 sp4 over Christmas for 845 with a free xbox one s. Look out for deals like this if going new.
The sp4 is a tad more responsive but really They are each as good as the other.
And when ur done coding you have a nice tablet to watch films on in bed....