As an update to this thread I started three years ago:
I purchased a Surface Pro 2 on clearance before the season began, and I'm officially a convert to tablet-based chasing. I didn't touch my laptop all year, and the SP2 mounted (in a rather unique, jerry-rigged way) to my dash provided by far the best chasing experience I've had to-date.
To address some of the concerns I had going in:
- I'm using a $15 Bluetooth GPS receiver from eBay, and although the initial setup wasn't entirely painless (as evidenced by a lot of the discussion the past 2 pages), it's been working at least as well as any USB puck I used prior. By far the most painful part of the setup was configuring GPS to work with Metro apps.
- Regarding offline mapping: it turns out that "Maps Pro" in the Windows Store, despite its mediocre user ratings and lots of complaints, is a fully functional touchscreen-friendly navigation app with the ability to use OpenStreetMap data. In this regard, it's very much the equivalent of MAPS.ME found on Android/iOS, which is good enough for me (even if not quite as full-featured as DeLorme/S&T were, e.g. for navigation). However, I should warn that once again, the initial setup was not without hiccups and annoyances -- the app author wants you to purchase OpenStreetMap data through the app, but you can easily download these free files from elsewhere, place them in the appropriate directory, and things work fine.
- As the first chase drew near, I had everything resolved except for a touch-friendly GRLevelX interface on the high-PPI screen. I wouldn't hold my breath waiting for the program itself to give tablet users an optimal interface (I'm sure it'll happen someday, but who knows when). As a result, I messed around in Visual Studio and created a rather ghetto x86 program which can float above the GRLevelX window and provide large touch-friendly buttons for basic tasks like switching products, playing/pausing a loop, and moving up/down through tilts. I used it myself all season and it made touchscreen operation of GRX painless for most in-chase tasks. However, I still need to go back and polish a couple things so I can post it here for others to use if desired.
All in all, I couldn't be happier chasing with the SP2. The only real challenge is mounting, although in larger vehicles that may not be an issue either. If you're able to dash-mount, the amount of space freed up compared against a laptop setup is monumental, and you lose virtually no functionality or power. I'm sure the same can be said of the SP3, even though it has a bit larger footprint that could possibly make mounting it even harder. However, after playing around with one at the store, I would say the Surface 3 (non-pro) is probably the ultimate chase device. Similar footprint to the SP2, but much thinner and lighter with a better power connector. On the other hand, the price-to-performance proposition for the SP3 (or SP2 if you can find one) is probably better than the S3, and I'd stick with the Pro series if you want to do full-on 1080p+ video editing on the road.