RANKED: The 4 best tablets to replace your laptop

The first iOS device to try to replace your laptop, the 12.9-inch iPad Pro (starting at $799) shares most of the same challenges as its 9.7-inch sibling, with a few key differences. First, its larger size means a larger, less unwieldy keyboard. It's somewhat less of a pain to type on, but still not that much fun for extended writing sessions.

Second, there are still only really two good reasons to make an iOS device your primary computer: if you only really need a device for web browsing and streaming, or if you're a serious illustrator. If you're a casual internet user, a bigger screen is just going to make the experience better. A comic book artist I spoke with who has used a 12.9-inch iPad Pro instead of a sketchbook for four months, said the 9.7-inch version wasn't even an option for him. He needs all that real estate for his drawing.

If you are going to buy a 12.9-inch iPad Pro though, it might be a good idea to wait until Apple releases one with the extra features like True Tone that now only show up on the 9.7-inch.

The first desktop-replacement laptop I can in good conscience recommend, the Microsoft Surface Pro 4 is a delightful machine to work with. Its type cover is the best on the market, with wide keys, a responsive touchpad, and plenty of breathing room where you can rest your hands. The stylus, called the "Surface Pen," has gotten less attention than the iPad Pro's Pencil, but I found it very useful in making adjustments in the full versions of Adobe Photoshop and Lightroom.

Most importantly, the Surface Pro 4 runs apps like the full versions of Photoshop and Lightroom because it runs a Windows 10 operating system. Windows 10's app store lacks the breadth and variety of tablet-specific apps that the iOS App Store does, but more than makes up for it by running every Windows productivity application wonderfully on its good-sized 12.3-inch touchscreen.

Its cheapest version will cost you $899, has 4 gb of RAM and 128 GB of storage, and runs with a fanless Intel Core M processor. This model should be plenty fast for most word processing or Xbox One game streaming needs. You'll also be able to run Photoshop and other Adobe apps, as long as you don't mind a bit of lag. Serious Adobe Creative Suite users and video game players can spec the processor up to an Intel i7, the RAM up to 16 GB, and the storage up to 1 terabyte, as long as they don't mind shelling out extra cash.

The complaints about the Surface Pro 4 come down to design and cost. Microsoft sells the tablet without its keyboard, as if there's a huge market for powerful productivity tablets among people who never need to type, so you'll have to tack $129 onto the base price of your model. Plus, the Surface Pro 4 is really uncomfortable to use in your lap or on a small table. Its kickstand, device edge, and keyboard combine for three separate, unevenly-weighted points of contact that you have to balance.

Other issues: a high whine from the fans on the i7 version which just sounds weird coming out of a tablet, and the lack of a secure storage slot for the Surface Pen, which is easily lost magnetized to the side of the device.

Still, if you want a tablet that can not only replace your laptop but do some serious video editing or other intensive tasks, the more expensive models of the Surface Pro 4 are your best option.

The best tablet on this list is also the newest and least well-known. The Samsung Galaxy TabPro S ($899 on Amazon) is a fanless Windows 10 device. It's the best of the bunch because it's a laptop-replacement tablet that doesn't try to do too much or too little, and it's the best designed. The TabPro S comes with an Intel M3 processor, 4 gb of RAM, and 128 GB of storage like the cheapest Surface Pro 4, meaning it's a plenty fast productivity or game streaming computer, but isn't trying to compete with more powerful, larger laptops.

Instead, this device is designed to succeed at tableting and laptoping at the same time without any bells and whistles. The keyboard is wide and comfortable to use, and forms a single, wide point of contact with your lap and table when deployed. It also folds back into tablet mode in a single motion, much more easily than the several required to stow all the Surface's parts. And the keyboard comes with the computer, meaning this is effectively $129 cheaper than the cheapest Surface model.

The only minor issues some people might have with this tablet are its lack of a stylus and that the keyboard ends close enough to the touchscreen that you might occasionally tap by accident while you're typing.