Looked at the iPad Prosumer then went and bought the Surface Pro 4.
Things SP4 is better than iPP:
- Base storage is 128GB instead of 32GB
- Better value with at $899 for 4GB/128GB model with pen vs $1048 for equivalent iPP 4GB/128GB plus pencil
- Pen is included, metal instead of plastic, battery lasts up to a year vs ~4 days, has eraser end, functonal button,
- Much better and more versatile Type Cover keyboard with touchpad and fingerprint reader, you can flip it around with keys facing the back when used as tablet
- Kickstand is very useful for when don't want to hold it for extended movie watching, presentation, etc., doesn't kill your neck vs only laying flat on a surface, more stable and thus safer than propping against something,
- Run professional software instead of blown up limited phone apps
- Full foreground and background multitasking vs very limited on iPP with two apps plus maybe PiP and background multitasking of apps like SSH/telnet, RDp, VNC, etc. is limited to 3 minutes
- Full desktop Chrome browser with Flash support and add-ons like uBlock Origin is superior to any mobile browser including Chrome mobile, you can render all sites with one universal browser vs wasting storage requiring an app per site
- Play immersive Steam games instead of shallow phone games that pretty much all make you grind for upgrades or milk you for IAP
- Mini-display port to output to external large screen
- Micro SD card slot to expand storage with 200+GB card
- USB 3.0 port
- 5MP vs 1.2MP front facing camera
- Sufficiently sized charger that charges while using unlike iPP
Things iPP is better than SP4:
- Tilt pencil shading makes up for the crappy keyboard
- Connected standby time for ARM