To tell a little bit more about myself, I'm starting an electronics business and I'm thinking of starting points ... I'm just thinking of start-up projects that people would actually buy.

This may just be me, but I would have appreciated if you'd said up-front that you were planning this as a business endeavor.  Nonetheless, I am interested to see what you come up with.

This looks quite interesting.  I would enjoy reading a detailed write-up if you are planning on making one.  I assume you are storing sprite data on the EEPROM and that this is copied to the Propeller's internal RAM on boot?  If so, is the Z80 involved in this process, or does the Propeller access the EEPROM directly?  Also, does your Cartridge ROM also contain your bootloader, or do you have a separate boot ROM?  I am aware this is off-topic for this thread, so you may wish to start a separate thread about this project.

To tell a little bit more about myself, I'm starting an electronics business and I'm thinking of starting points; areas where I can begin. I am interested in video games, music, computers, and robotics (to say the least) and I'm just thinking of start-up projects that people would actually buy.

I am 100% willing to build anything computer electronics related. You should check out the 8-bit console I built recently.

http://imgur.com/gallery/VZRax

Thanks again for your input guys.

If someone could make something like this, that would be pretty swell.
http://www.youtube.com/watch?v=NV6IFOVY-go

Oh my god I love it.

Like, a hard synth that has all of the different chips from each packed into it and can utilize all of them.

may be intimidated by the quantity and complexity of the equipment necessary to produce over-the-top and awesome chiptune.

intimidated?
gameboys always frightened me...

My fantasy idea would be something very like what you want, though too crazy to build most likely. I would be a synth keyboards that has real chips on board being used as oscillators. Like switchable between modes like SID mode or 2a03 mode or POKEY mode. I could do cool stuff like route the 2a03 through the SID filter and would have on board routable LFOs and envelopes for controlling the chips. Kinda like MSSIAH and MidiNES stuffed into an all in one hardware synth.

Like the keyboard everyone pretended Crystal Castles had.

Personally I feel that dedicated all-in-one solutions are conceptually in conflict with (at least a subset of) Chiptune as a way of music creation. For me, it is the limitations of using old hardware designed for playing video games (not designed for making Chiptunes) that gives much Chiptune music a great deal of its character.  This applies to me both as a listener and as an LSDJ user. I enjoy it when I can listen to a piece of music and think, "Wow, was that really 1xLSDJ?"

an analogue synth or a DAW isn't Chiptune.

I think staying true to the spirit of Chiptune is important, but also being part of the community in addition to wanting to give something to the community.

The limitation really is a huge idea-catalyst. But you'll find that it's inevitable that a lot of people turn to DAWs in chipmusic. I feel guilty (chip guilt?) when I try layering DAW stuff on top of 1xlsdj. But it's become kind of universally panned to be a 'purist' about chipmusic at this point because it doesn't really contribute anything, so...

That being said, I think there is a market within the Chiptune community for new and innovative hardware / software projects that push the limitations of the hardware we use, although such projects have been met with a variety of opinions.  For example the Ninstrument Synthboy has been somewhat controversial, while the Arduinoboy has been generally well-received (notwithstanding the confusion of some new users about the many modes).  I think staying true to the spirit of Chiptune is important, but also being part of the community in addition to wanting to give something to the community.