I think DSLR wireless connectivity and transmission of data is the wave of the future. It will make many things easier for everyone.
Resistance is futile.
Practicality 1:
You're shooting a wedding with a 6D (the best low light camera that Canon makes). You have your laptop in your backpack. You've set up the EOS utility to transmit full raws. You have the folder "watched" by lightroom for auto importing.
So you're shooting away, all the while, your RAWs are being ingested into Lightroom on your laptop.
Some photographers like to sell photos at the venue. This is a handy way to get rid of wired tethering and make everything easier. Also, the files are being backed up automatically.
Practicality 2:
I'm in my studio posing a family. I have my EOS utility app connected to my 6D. Focus is set, and I can use the app to see a live view of the image, and also to remotely release the shutter. This way I can focus on the posing and how the people look, and not be behind a view finder.
Practicality 3:
I take an awesome shot of my kid with my 6d. But I'm on the road and nowhere near a computer. Sure, I can snap a shot with my cell phone, But it just doesn't have that same Juicy DOF that the DSLR sensor gives me. Also, I have much less control over exposure with my phone, so I'd look to shoot with my DSLR whenever possible. The photos automatically download to my phone through EOSutility. They are all there, for me to see, and share if I want to.
I'm not going for broke here, it's a pic of my kid I want to share with friends and family. I share it directly to Facebook because I did it right in camera and it looks good.
Again: resistance to Wi-Fi is futile. This is the wave of the future. There are many practical advantages, and there will be more and more as tech advances.
If anything, we need MORE Wi-Fi connectivity and options. Right now, there is no EOS utility app for iPad. Imagine how nice it would be to see your pictures at 10inches, the near equivalent of an 8x10" print, right in your hands, instantly after taking the picture. So many possible uses. You could use this to show a client the image you just took. You could create a slide show. You could see minor imperfections that you couldn't see on your small DSLR LCD.
DSLR Wi-Fi is in no way perfect, but it has a boat-load of potential. And I will be (already am) one of the first to take advantage of it.
We are just on the cusp of what's going to be possible.