Best thing to do is have a kick-ass set. Actions speak louder than words.
There used to be a pretty serious holy war based on vinyl records vs. laptops, but that’s been fairly settled (except for the extremely hard-headed). Nowadays we’ve moved on to a new holy war - Laptopistan vs. Tabletistan.
I think tablets work well in a variety of situations - but it’s also good to acknowledge the strengths and weaknesses of each platform - especially when considering different venues, crowds and events.
This is where I think laptops are still better than tablets:
Laptop Keyboards - are still better for searching through your library than touch-scrolling or using the library knob. Sure if you’re doing and EDM set and you’ve got less than 100 tracks in your playlist it’s not an issue. But if you’re playing open format and you have to quickly search and jump around through thousands of tracks, through multiple decades as the crowd empties and re-fills the venue - a laptop keyboard with a set of arrow keys is a lifesaver.
Performer/Event music - Laptops win here, having extra USB ports make it easier when you’ve got multiple people at an event giving you music and videos to play during an event. I’ve had hosts, performers, mothers of the bride, best men - give me a file, last minute, and it needs to be played for a once in a lifetime event - except they’ll send it via email, USB stick, Facebook Messenger (fricking CDs still!!!) and all types of crazy media that you wouldn’t believe! And then it’s all in a weird format invented by Russian hacker in the middle of Siberia. Yeah, in those clutch cases, you definitely want a laptop.
Cables/Connectors - for the most part this is where laptops generally win - though tablets are catching up - the number of controllers where you can just plug in a tablet are still far and few in-between. If you’re using a Pro controller and connect a laptop, you generally only need 1x USB cable - the setup and breakdown is generally clean. But when seriously using a tablet - all of a sudden you need a USB Hub (with power adapter) sometimes you need a CCK Apple Dongle (with power adapter). And soon you’re growing a baby kraken of cables on your DJ table. I’ve done it before with djay Pro - but every time I had to setup/breakdown and look at all the extra points of failure, I kept wishing for a laptop with it’s simple connection.
In fairness though, I think things will be getting better for tablets in the near future. The Pioneer DDJ-FLX4 is just the ticket for solving the problem, just received mine today and I’m ecstatic how easy it is to connect both laptop and iPad. I hope we see all future MIDI controllers adopting the same design.