Mobile World Congress has just come to a close and with all the high tech devices and emerging technologies on display, it's a good time to do a bit of 'Tomorrow's World' style future gazing into what the phones of the future may look like.

Here are 3 key trends we've picked out:

Huawei-Ascend-MateSmartphones are getting bigger, tablets are getting smaller so...

If any of you owned a mobile phone back in the 1990s, you'll remember the first phones were considerably larger than they are now. Drop it on your foot and it would have broken a bone.  Over the next 15 years or so, phones then got smaller and smaller - until the advent of the smartphone that is. Now phones are getting bigger again - from 3.5 inches to 4 inches to almost 5 inches - albeit slimmer at the same time, more like tiles than the house bricks of old.

At the same smartphones are getting bigger, tablets are getting smaller - a trend popularised by Amazon's Kindle Fire and taken up by Apple with it's iPad Mini.

So it's looking like smartphones and tablets may 'converge' - that in future years we'll be carrying one 'phablet' device round with us that we can listen to music on, play games on, browse the internet on and phone our friends on.

Sony_Xperia_ZPhones that are more durable

The average life of a mobile phone contract is 18 months to 2 years. Something that's used as often as smartphone is going to get a fair amount of wear and tear.  And as smartphones get more more sophisticated and more expensive, the penalties for dropping it on the floor, down the toilet, in the batch etc are more extreme.  As a result, you can see how more durable phones might appeal to the public.  So we've seen screens get tougher, but we've also see an whole new raft of more rugged phones - from Sony's waterproof, dustproof and dirtproof Xperia Z to Huawei's waterproof, dustproof and impact proof Ascend G350.

Phones that are wearable
Carrying, finding and using a phone can be a bit of a pain. There's that 'phone's ringing, now what pocket did I put it in' moment. Even when you do know where it is - for example, a rather large handbag, actually finding that thing can be a bit of a challenge. And then there's the chance that we'll have a momentary memory seizure and leave a very expensive piece of technology behind in a bar, restaurant or whatever. But if you're wearing it, many of these problems go away.

So it's hardly surprising that we're starting to see a clutch of 'smart watches' appear in the market, and that Apple is planning to release one soon.  At the moment, their scope is only to interact with the users phone, but how long before something wearable becomes the phone itself?

What direction do you think smartphones are heading in?  Would a hybrid phone/tablet be appealing to you? Would you like your phone to be more robust?  Do you think wearable technology will be the future?