Can I abstract PaaS application development and deploy to any cloud?

 Yes! Juju from Canonical Ltd. can do this and much more. A new entry into cloud domain.

Juju is not a PaaS offering. It allows developers to develop applications and then choose a PaaS to deploy (any private or public cloud). The applications could be deployed to a local Ubuntu Server as well. Also allows applications to migrate from one cloud to another. 

So this application abstraction from a specific cloud is making applications more independent / generic so they could execute on any cloud

Juju supports Cloud Foundry, which means even applications built for IBM Bluemix offering should be managed by Juju. 

Juju can be seen as a 'do it yourself' PaaS that allows PaaS platforms to run next to "legacy" software stacks in order to create a customized PaaS.

Juju is a service orchestration management tool that can bootstrap the applications to many clouds- Amazon Web Services, HP Cloud Services, Microsoft Windows Azure, OpenStack, etc.,

Juju client can run on  Ubuntu, Mac and Windows

What is Internet of Things (IoT)

IBM identified the need for making smarter cities with the integration of various technologies, products and services. Around 6 years ago, IBM started it's investment in Smarter Cities business that helps cities gain value from analytics, deliver services from the cloud, to mobile devices and engaging people in cities using social media. IBM is applying CAMSS technologies in cities to  confront some of their biggest challenges and starting to see some very attractive returns. 

Today the world calls it "Internet Of Things" (IoT) which is making way for us to build Smarter Cities.

Watch the Smarter Cities IBM YouTube channel for more videos https://www.youtube.com/channel/UCIOYaH-xjvKCuMncEaBl35Q