I actually never heard about this Apple Newton device. I checked it on Google and I am sorry to say that I do not consider it for this thread.
It seems to be like a PDA. One could say that the iPhone is the Apple Newton advanced device. Never the less, those devices will never completely replace a laptop and desktop.
Some comments for you to consider.
At the time, a Newton could easily replace your desktop or laptop computer. It was extremely handy for those who traveled extensively compared to a laptop. Remember, the Newton was discontinued over 10 years ago and yet many still use their Newton devices today.
The Newton was Apple's first attempt at a PDA way before others in the industry. By the Newton 2100, Apple had perfected many of the shortcomings of the prior models. Even the handwriting recognition worked extremely well. Unfortunately, by then it was too late.
Now here is something that you may not be aware of. One reason that SJ killed the Newton upon his return to Apple is that the Newton OS and the Mac OS were getting to the point of competing with each other resource wise within Apple and SJ wanted to focus their efforts. This was very reminiscent of the Apple IIgs and the Mac OS in the early days of the Mac. The Newton OS is scalable and object oriented. While the Newton never went color, the Newton OS supported color and you could drive external color displays with an PCMCIA adapter.
There was also an external keyboard for the Newton which allowed it to be used like a laptop. Additionally, there were many desktop type applications for the Newton such as word processing, spreadsheet, database, time management, graphics, photo, audio recording with limited editing, web browser, e-mail, communications, and even a server application (which you can see in my link above). And the cut and paste function between applications was very advanced. There was a nice PowerPoint type presentation software application (was a Beta tester). Using this software you could connect the Newton to a LCD display for presenting your presentation. There were even some 2 & 3D games that were fun to play.
The Newton could print via infrared printing to typical laser printers of the day. Sending and receiving faxes with an optional PCMCIA card modem was a synch.
One area that the Newton excelled and is still popular to use is for note taking. The handwriting recognition is very good and fast. And you can write now and interpret later as well which is handy.
Last but not least, you may be surprised that some Newton technologies are part of Mac OS X such as Inkwell and the dock for example.
Anyhow, I would venture to say that if you tried using a Newton for a while you would change your opinion. But that's just me.