I want to see Javascript's foundations being totally reworked.

Javascript's performance, large application range and community support gives it A LOT of potential to be the number one language in the globe. It's not quite there yet because it's foundations are weak.

It doesn't provide a reliable platform for developers to trust in. It lacks basic features, It's standard library is poor and it lets too many errors go unnoticed. Once this changes (and it's already changing), there are no limits for what JS can achieve :D

I'm really eager to see this happening.

I'd like to see the web take back some mind share from native apps. We have a huge split of effort between web apps and installed/native apps; and no really good reason for that to be happening. From a technical perspective, browsers are getting a bunch of great APIs giving access to hardware and OS features. This could always have been the way, instead of having years of walled gardens driven by intentionally-created limitations on web browsers. Some will argue that walled gardens allowed developers to get paid; but in reality just a small number get most of the money.

From a business perspective, the web is still struggling to find a decent business model for publishing content. The only thing that has truly worked for long periods is "whack ads on it". There are individual cases where some other approach has worked at least for a while; but by and large it's ads or more ads.

So there needs to be a business breakthrough. Some way for content publishers to get paid fairly for what they do, that's more nuanced than increasingly-aggressive or increasingly-creepy advertising strategies.

I know I was meant to say VR! 3D! Yeah! ...but that's not going to take off until they can make properly-affordable, lightweight hardware and an experience that doesn't make a lot of people throw up. That's a pretty big deal breaker, really.

Edit: also I'd like the web to finally embrace accessibility.

Web IS about blue links, images and primarily - text. More 3D for what?

Conversational interfaces will grow in numbers but this is not really web's question but AI, ML.

My vision of Web 3.0 is not much different. Web will become a personal assistant and an open global network could be used without any devices. People will simply ask (or just think?) what they want and machine will do the rest and in some cases AI would be able to predict what wou will need in the nearest future.

Obviously I want more security and speed in the web. But another thing that I think will take Web into the 3.0 is IoT. I think having more devices connected to the web will transform our lives and solve many problems.

3D. Virtual reality. There are already these insane 360 view adverts for cars and property online. With more affordable vitual reality head gear, there will be super interesting developments over the next couple of years. Holographic projections. A more interactive web

A replacement for Javascript. Brand new, from the top down, removing the need for so many frameworks, compilers, etc...

Server side? Hundreds of languages. Frontend? 1 - why? Why is there no competitor (VBScript is long dead) to what amounts to be a reliant scripting language for most developers.

Apple did it with Swift - now iOS has 2 native languages. Why can't the browser community do the same? Microsoft has always had multiple languages for their systems. Linux as well.