I also use a Surface Pro for remote location work - it's useful to have Lightroom and CC available to run quick edits for a client, and it's happy to run EOS Utility on the end of a 15m USB cable for polecam stuff. But there are some issues compared to a regular laptop:
- Relatively small, fixed SSD. Windows will take up half, so on a multi-day shoot with raw files or video, the entry-level models are easy to fill. The 256G versions are quite a hike in price. You can plug in external drives, but...
- Only one USB3 port. It's nice to have USB3 for a card reader, but if you're trying to copy from a card to an external drive or offload a card while tethered, you need a spiderweb of portable hubs, external battery packs; it starts looking messy.
- Battery life on the SP1 and SP2 aren't all that great; it is after all a laptop in a tablet case. I'm happy to get an hour of heavy-lifting before my SP2 complains. MS sell car chargers and the 'power cover' keyboard for another $200, but the options for an external battery pack are limited to say the least, thanks to the magnetic connector.
- You have a mini-displayport for plugging in a larger screen (up to 3840 x 2160); easy to find $5 adapters for HDMI or DVI, but the port itself is hardly what you call rugged, and short of superglue there's nothing
on the Surface you can attach strain reliefs to.
- You cannot repair it, period. It's sealed, glued, welded, protected by a curse, then glued again. When the battery gets worn out, you have a placemat.
Having said that, you do get CPU performance comparable to laptops. I've converted and graded MLV raw footage on it to send dailies across; not exactly a 60-second job but it was a whole lot easier to hike to the location without a 17" XPS laptop